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[[quoteright:350:[[ComicBook/ScottPilgrim http://static.tvtropes.org/pmwiki/pub/images/nckmdfj.jpg]]]]
[[caption-width-right:350:"No, that's not what I meant when I said I wanted to get hammered tonight."]]
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->''"From this bag here, why, I can pull most anything imag'nable\\
Like office desks and lava lights and Bert, who is a cannibal."''
-->-- '''Yakko Warner''', ''WesternAnimation/{{Animaniacs}}''
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Hammerspace is the notional place that things come from when they are needed, and where they go back to when not. The term was fan coined as the place cartoon characters and anime/manga characters would store the overly-large hammers and assorted weaponry they had a propensity for hitting each other with, especially for comedic effect.

The actual location of hammerspace is very hard to determine. There seems to be a great deal of it behind people's backs and on the opposite side ([[FourthWall from the camera]], that is) of [[BehindAStick thin things like lampposts and slender trees]]. It also hides in people's coats, closets, {{clown car}}s, large sacks, and occasionally [[TrouserSpace down their pants]].

Further research into the exact location of Hammerspace awaits solution of a few more basic questions. Such as: "What happens when you turn a BagOfHolding inside out?" and "Why is the inside of [[Series/DoctorWho the TARDIS]] only ''that'' [[BiggerOnTheInside much larger than its exterior]]?"

%comment% (Notice that, while we have discussed Hammerspace in great detail, we'll have to ''stop'' here, as we can't even ''touch'' Hammertime as a concept.)

It's also referred to as "hyperspace", but that term gets a little confused with the [[SpeculativeFiction SF]] term related to FasterThanLightTravel (see SubspaceOrHyperspace). Just to confuse things further, "subspace" is a word used in ''{{Franchise/Transformers}}'' fandom for Hammerspace. It is called "katanaspace" in ''Series/{{Highlander}}'' fandom, "back pockets" in the cartoon [[TabletopGames roleplaying game]] ''TabletopGame/{{Toon}}'', and referred to simply as "Elsewhere" in the FantasyKitchenSink roleplaying game ''TabletopGame/{{Exalted}}''.

There are multiple versions, in order of size:
# '''Basic Hammerspace''': This version contains only a few things, not because it is limited in capacity, but because that is all it is ever used for--for example a large weapon, or Optimus Prime's trailer. It is usually played for convenience, and most viewers give it a HandWave, although there is occasional {{Lampshading}}.
# '''Game Hammerspace''': Used frequently in games--many of your inventory items are much too large or too heavy to be carried normally, and this is where they are stored until they are used. Game Hammerspace may or may not be infinite, depending on whether your inventory has a limited number of items or weight, but it still holds many things without spoiling the lining of your coat.
# '''Infinite Hammerspace''': This version is played with a bent towards comedy. It can traditionally hold as much as the joke requires it to hold, may have multiple dimensions to its capacity (eg somebody looking in and finding one thing, closing the 'door' and looking in again to find something else), and often [[{{Flanderization}} gets larger as the show goes on.]]

To take even more comedy out of what is already impossible, a character with established access to Infinite Hammerspace may, after packing it full of things, finally fill it up. With Basic Hammerspace, they are more likely to lose access to it for some reason and be unable to retrieve an item.

All PointAndClick adventure games had this to an extent or another, because of the technical limitations of the medium preventing these games from having the hundreds of thousands of sprites necessary to represent your character holding any combination of inventory items you can have. So it's usually treated humorously instead.

The term "Hammerspace" originated in the ''Manga/RanmaOneHalf'' fanfiction community, ironically largely as a result of {{Fanon}}, as neither the titular Ranma nor the character most often associated with it (Akane Tendo) exhibited this trope to an excessive degree, though it was present in the source material.

'''{{Sub Trope}}s include:'''
* BagOfHolding
* BottomlessMagazines
* HammerspaceHair
* HammerspaceHideaway
* HammerspaceParachute
* HyperspaceArsenal
* HyperspaceHolmesHat
* HyperspaceMallet
* HyperspaceWardrobe
* MisleadingPackageSize
* RummageFail
* ShakeSomeoneObjectsFall
* StomachOfHolding
* TalkingWithSigns
* TreasureChestCavity
* TrouserSpace
* VictoriasSecretCompartment
* WalletOfHolding

Physicists are still split over whether or not there is a Hammerspace-[[Music/MCHammer Hammertime]] [[IncrediblyLamePun continuum]].

!!Example subpages:
* Hammerspace/AnimeAndManga
* Hammerspace/ComicBooks
* [[Hammerspace/LiveActionFilms Films – Live-Action]]
* Hammerspace/{{Literature}}
* Hammerspace/LiveActionTV
* Hammerspace/TabletopGames
* Hammerspace/VideoGames
* Hammerspace/WebComics
* Hammerspace/WebOriginal
* Hammerspace/WesternAnimation

!!Other examples:

* The GEICO gecko is apparently an expert at using hammerspace; he is shown to be able to hide a cell phone and wallet larger than his entire body on his person, [[http://www.youtube.com/watch?v=HwUj445MdiU confusing his boss]]. Further confusing the boss is that neither he nor the viewer sees the gecko produce the items. [[spoiler:The cell phone was already on the table and the wallet is seen only after he turns back around after he talks to a waiter.]]
* Cara Confused from the UK's Confused.com ads has been shown to pull various objects from her pocket, including a house! Many people have "confused" this for something dirtier, as the way every instance is animated seems very out of context.

[[folder:Fan Works]]
* General: The term "Hammerspace" originated in Fanfic, most likely for ''Manga/RanmaOneHalf'', though the effect itself stems back to the earliest days of animation and graphic fiction.
* ''Webcomic/AxisPowersHetalia'' fanfic ''[[https://www.fanfiction.net/s/11886910/1/Gankona-Unnachgiebig-Unità Gankona, Unnachgiebig, Unità]]'': [[{{Parody}} Parodied]] several times. From clothes to books to Death Notes to flowers, the characters' backs can store them all.

-->"It's alright Italia-kun. I always bring spare cosplays with me." He reached into some sort of secret compartment behind his back, pulling out an identical outfit to the one the brunet was currently wearing. Seriously, how do anime characters have such an ability?

--> Japan disappeared into a bathroom for a short amount of time before reappearing, now clad in a sharp black suit and tie with a white dress shirt and black pants, taking hexagonal glasses from his pocket—or wherever anime characters store all their stuff—before putting them on.

-->"Humph." The larger scoffed back. He then reached into the magical space all anime characters have, whipping out a book conveniently titled 'How to Catch a Runaway Italian'.

-->Both reached into the magical space all anime characters have, extracting black notebooks—Japan's having unidentifiable symbols on its cover as Italy's had 'Death Note' clearly printed on it in gothic letters—before taking out pens and colored pencils as well, opening the pages before scrawling in them.

-->Giggling, the auburn reached into the magical space all anime characters have, an exquisite bouquet of utmost grandeur popping out from behind his back. "Tada!"

* ''Fanfic/ACrownOfStars'': The Avaloni soldiers know how creating their own pocket space.
** In chapter 53:
--->'''Shinji:''' Where did you get this?\\
'''TJ:''' Holdout Pocket technique. A little spatial fold tied to your personal space, good for keeping an emergency backup weapon or something handy. I also keep cold drinks in mine. It’s not a hard trick to learn. First year Weapon Theory stuff. I could probably teach you pretty quickly if you’ve got a gun or a knife you’d like to try it on.
* Heavily used in ''Fanfic/BlackQueenRedKing'', where there's a spell to generate it.
* Powers the main character's BagOfHolding in ''Fanfic/{{FREAKINGENSOKYO}}''.
* ''Fanfic/ThousandShinji'': Asuka instinctively summoned axes and other bladed weapons out of thin air. She did not knew where she pulled them from or where they went go to. She only knew she was brandishing a weapon whenever she need one and it disappeared after fulfilling its purpose.
* In the ''WesternAnimation/JackieChanAdventures'' and ''WesternAnimation/TeenTitans'' crossover fanfiction ''Fanfic/AShadowOfTheTitans'', Jade mentally {{Lampshades}} this with Suzano and his staff (bonus points for actually using the ''word'' "hammerspace").
* [[Anime/SailorMoon Mercury]] uses and abuses the [[VideoGame/DungeonKeeper Keeper's]] storage ability in ''FanFic/DungeonKeeperAmi'' to great effect. It can be used to construct complicated machinery and architecture, store spells for later deployment, catch falling minions and deposit them safely, and teleport.
** As a fanfic of the above, the Keepers of FanFic/DungeonKeeperOfLoveAndJustice have the same abilities.
* Calvin grabs ''[[PintsizedPowerhouse a bicycle]]'' out of nowhere in ''Fanfic/CalvinAndHobbesTheSeries''. [[LampshadeHanging "Hey! Where'd you get that bicycle?"]]
* Nanaki (Red XIII) seems to have this in the fic "Courage to Change the Things You Can." It's used as the story's 'real world' explanation for the massive amounts of storage space the game gives you, but no one else understands how he's doing it and whenthe fic's O.C. main character finally gets mad enough about it to demand an explanation Red replies "I understand your confusion. But I like all of you too much to risk making your primitive hominid brains explode from the revelation."
* [[LampshadeHanging Lampshaded]] in the ''FanFic/{{Memoirs}}'' of Manga/InuYasha's [[UnnamedParent father]]. The [[NoNameGiven narrator]] several times wonders where his clothing and equipment go when he transforms into a dog.
** Later hilariously [[ExploitedTrope exploited]] when the characters need to carry a large amount of luggage, so just give it all to the narrator and have him turn into a dog to whisk it all away to HammerSpace.
* In ''Film/JamesBond'' fan film ''WebVideo/DiamondsCut'', [[TerroristsWithoutACause terrorist]] sniper at the beginning of London scene uses a laser sight. Try as hard as you might, there is no way you’re going to find it on his rifle, probably because the actual effect was obtained through the use of laser pointer.
* ''FanFic/HomestuckHigh''; Eridan carries a guitar in his pocket. Particularly bizarre in that the canon actually has sylladexes, a form of technology which would actually permit this, but they seem to be absent from the rest of the fic.
* Used and [[DiscussedTrope discussed]] in the fanfic ''Fanfic/TailsOfTheOldRepublic'', a crossover/ FusionFic between ''Franchise/SonicTheHedgehog'' and the videogame ''Franchise/StarWars: VideoGame/KnightsOfTheOldRepublic''. Tails basically carries a portable pocket dimension in his tails, and he even calls it [[HyperspaceArsenal Hyperspace Inventory]]. It's not perfect, however, and Tails feels the weight of everything he's carrying, and his hammerspace can implode if he loses all his Chaos power. Carth Onasi eventually dubs it "tailspace".
* Loopers in FanFic/TheInfiniteLoops have what they call a subspace pocket. Not only can these hold quite a bit, they also carry between loops. The oldest loopers are said to be able to carry entire solar systems in theirs.
* In the ''WesternAnimation/DarkwingDuck'' fanfiction series, ''FanFic/NegaverseChronicles'', Quackerjack tends to pull random toys/weapons, cups of coffee, and other assorted object out of... somewhere.
* In ''Fanfic/RomanceAndTheFateOfEquestria'', AntiHero Venni wears [[HellBentForLeather leather garments]] covered in pockets, from which she produces a variety of weapons and other useful supplies. Falls into this trope when she produces a wrecking ball and a hang glider, which are apparently collapsible.
* In ''Fanfic/ALongJourneyHome'', Jasmine and Myrddin both have one for their Focii. It apparently works but storing them in their soul.
* Parodied in one episode of ''WebVideo/YuGiOhTheAbridgedSeries'': Melvin draws the previously invisible Millennium Rod from behind his back, saying:
-->"I will now use the Millennium Rod, which I keep clenched between my buttocks, to send this duel to the shadow realm!"
* In the fanmade ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' series ''AudioPlay/DoctorWhoovesAndAssistant'', Ditzy insists that ponies have "pockets" to store things, even when they're not wearing anything. The Doctor finds the idea absurd, until he accidentally pulls out his sonic screwdriver from one.
* As ''Fanfic/DreamingOfSunshine'' is a ''Franchise/{{Naruto}}'' fanwork, this comes into play as one of the first applications for seals that Shikako makes use of. Interestingly, in Shikako's case, she uses them on her own body frequently, sealing important, useful, or valuable items directly to her person.
* Humorously mentioned in ''FanFic/ChildOfTheStorm,'' as all mothers and grandmothers (specifically [[AlmightyMom Alison Carter]]) seem to be able to pull an inexhaustible number of tissues out from some hidden place on their person when comforting a crying (grand)child.

[[folder:Films -- Animation]]
* ''Disney/{{Aladdin}}'': In the Cave of Wonders, both Aladdin and Abu don't have anywhere to put the lamp, since Aladdin's pants don't have pockets, and Abu doesn't have anything big enough to hold it, so when both are preoccupied, the lamp disappears, and reappears when needed.
* ''Disney/AliceInWonderland'': The items Alice needs to "access" Wonderland appear out of nowhere.
* ''WesternAnimation/{{Bionicle}}'' movies: The Toa keep all their supplies, tools, etc. in hammerspace, but it's never made clear ''where'' they put them (the animation just shows the objects retracting "into" their solid backside). The novels at least give them the benefit of carrying satchels. It's also implied in other media that this is where the Makuta kept their excess parts when shapeshifting into smaller forms.
* ''Disney/{{Cinderella}}'': After Cinderella's fairy godmother offers to help her get ready for the ball, she searches around for her magic wand, before remembering that she "put it away." She then uses a special hand motion to make the wand appear out of thin air.
* ''WesternAnimation/CloudyWithAChanceOfMeatballs'': Brent pulls a pair of giant [[RibbonCuttingCeremony ceremonial scissors]] from seemingly nowhere, but then stores them down [[TrouserSpace the back of his pants]] after showing them off.
* ''WesternAnimation/HowToTrainYourDragon'': Hiccup has a modest Hammerspace where he keeps a notebook that's too big for a pocket. Moreover, when he puts it away, he just shoves it under his vest in the general direction of his back and lets go.
* ''Disney/{{Pinocchio}}'' (Disney version): Jiminy Cricket pulls out a pair of glasses that, while proportionate to his large head, are far too big for his back pocket.
* ''WesternAnimation/SinbadLegendOfTheSevenSeas'': All the crew members of Sinbad's ship have to empty their pockets of weapons onto a table before going into the royal palace. Cue Jed [[ExtendedDisarming spending about twenty minutes depositing a huge pile of swords, pistols, knives, etc., on top of a table.]]
-->'''Kale:''' Time to go, Jed pack it up.\\
'''Jed:''' ''[still pulling out swords, then stuttering from all the stuff he pulled out]'' Aw, man...
* ''Disney/{{Tangled}}'': Rapunzel carries Flynn's satchel around for nearly a day in spite of the fact that she had nothing to carry it ''in'', and she was ''with Flynn the entire time.''
* ''TheRoadToElDorado'': Miguel manages to keep the map in his shirt easily, which could be explained by the fact that his shirt is tucked into his trousers, but the map appears to disappear whenever he puts it in his shirt, as it doesn't affect how his shirt lies in any way. Chel and Tzekel-Kan are more direct examples: Chel manages to hide a pair of dice on her [[https://vignette.wikia.nocookie.net/roadtoeldorado/images/1/1d/Chel.jpg/revision/latest?cb=20120127233013 despite her outfit having no visible pockets]], though at least dice are small, and Tzekel-Kan keeps ''an entire book'' [[https://vignette.wikia.nocookie.net/dreamworks/images/f/f3/Tzekel.jpg/revision/latest?cb=20111205023539 under his shirt]], if you could even call it a shirt.

* In ''The UltimateShowdownOfUltimateDestiny'' and its video, Abraham Lincoln "took an AK-47 out from under his hat / And blew Franchise/{{Batman}} away with a rat-tat-tat-tat".
* Used as a literal AssPull in Sherry Vine's and Peppermint's [[http://www.youtube.com/watch?v=8685ogp7QRQ Telephone Parody]], where various utensils are pulled out off Sherry's tush... including a ladder!

[[folder:Myths & Religion]]
* Thor of Myth/NorseMythology could make his hammer Mjölnir shrink to an incredibly tiny size, and be pulled out of seemingly nowhere, and is perhaps [[UrExample the first user of this trope]]. Frey owns the ship ''Skíðblaðnir'' that he can fold up and stick in his pocket.
* In traditional Chinese folklore, many powerful people essentially had sleeves that could store everything. Being trapped in one was generally a sign that you were screwed.

[[folder:Pro Wrestling]]
* An episode of Monday Night RAW saw Wrestling/TripleH, known for carrying around a sledgehammer, facing off with Wrestling/RandyOrton holding a sledgehammer. Orton suggested they both drop their weapons and just go at it like men. Triple H agreed, both men ditched the hammers they were carrying, and then, after stepping into the ring and removing his jacket, [=HHH=] pulled another full-sized sledgehammer out from behind his back and proceeded to chase Orton away. Now, yes, the second hammer was concealed behind his back the entire time, held by a special rig, but the fact that someone managed to pull off the illusion of Hammerspace on a live television program was impressive.
** Beneath the ring could count, as everything including a kitchen sink has been pulled out from under the ring. Wrestling/{{Hornswoggle}} even lives under the ring and apparently, so do a bunch of similarly sized people. At first, it was just a joke by Wrestling/{{JBL}}, but then after being sued by Hornswoggle, DX has to go under the ring and not only find a full sized courtroom, but [[SerialEscalation a building!]] So yes, on WWE shows, under the ring is officially Hammerspace. It's also been known to contain a portal to Hell.

* In Creator/WilliamShakespeare's ''Theatre/{{Othello}}'', during the eponymous character's final scene, he pulls out weapon after weapon, as if from hammerspace.

[[folder:Web Animation]]
* ''WebAnimation/DeadFantasy Part II''. Yuna reaches into her clothing and pulls out two ether bottles to revive an exhausted Tifa. They're so large that there's no way they could have fit in her clothing normally.
* ''WebAnimation/{{RWBY}}'':
** There is no way Ren's gun-blades should be able to fit into his sleeves, let alone leave no sign that they're there. Nevertheless, that's exactly what happens.
** Professor Ozpin is always seen with either a cane or a coffee mug, never both. The most blatant occurrence is during the show's very first trial which happens on a cliff edge and in the forest below. Ozpin sends the students off while nursing coffee, no cane in sight. Then he's seen monitoring the lesson while leaning on his cane, no coffee mug in sight. Before this event, the fandom already had a RunningGag that the cane and the coffee mug are the same item, morphing between the two states whenever Ozpin MustHaveCaffeine. This event gave that gag wings.
** [[BigBad Cinder Fall]] can apparently use her fire powers to summon a pair of blades, which can also [[SwissArmyWeapon double as a bow]]. There's no indication yet as to exactly ''what'' is going on (Cinder has always been something of an anomaly), but her clothes do glow when she summons them.
** Ruby and Yang's father sends them Zwei, the family corgi, by mail. Somehow, the dog recovers almost instantly from spending a goodly amount of time squished into a mail tube. That's not what makes this an example of hammerspace, though. That would be when Yang gives the tube a good shake, unloading a massive pile of dog food cans, plus a can opener.
* Characters in ''WebAnimation/LegoPirateMisadventures'' routinely pull guns, and in one case, a spear, out of nowhere.
* In ''WebAnimation/XRayAndVav'', Hilda reveals that X-Ray and Vav's "overundies" are essentially utility belts connected to another dimension, giving them access to all sorts of gadgets. X-Ray, then, decides to have ADateWithRosiePalms.
* ''WebAnimation/DSBTInsaniT'': Kayla openly states this is where she gets her treasure chests from.