[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/bioman_v1_4.jpg]]
[[caption-width-right:350:The Bioman team and their friend Peebo.]]

->''One! Two! Three! Four! Five! Choudenshi! Bioman!''

''Chōdenshi Bioman'' (Super Electron Bioman) is the eighth Franchise/SuperSentai and aired from 1984 to 1985. The TitleThemeTune was performed by Takayuki Miyauchi.

500 years ago the Bio Robo traveled to Earth from the Bio Star and showered five people it discovered with Bio Particles. In the present day, Doctor Man tries to take over Earth with his mechanized followers, Neo Empire Gear. Now the robot Peebo must gather the people whose ancestors were infused with the Bio Particles to become Bioman and save the world.
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!!'''Recurring''' Super Sentai tropes:

* AllYourPowersCombined: A few of the team attacks involve this.
* BossSubtitles: Introduced this trope to ''Super Sentai''.
* ByThePowerOfGreyskull: "Bioman!"; or, their individual names.
* CallingYourAttacks
* ColorCharacter: The codename pattern consists of using each member's color as the head word and a corresponding number as the tail. This is the number in which the team, in their original composition, first transformed.
* ColorCodedCharacters: The Biomen of course.
* CoolAirship: The Bio Dragon.
* CoolBike: Red One's Bio Mach I and Yellow Four's Bio Mach II.
* CoolCar: The Bio Turbo driven by Green Two.
* DiegeticSoundtrackUsage: Hikaru is playing the Bioman opening theme on the flute while walking towards the enemies in episode 15, and again in 39.
* EyeCatch: The eyecatch features a normal version of Red One and small versions of (Clockwise from bottom left) Blue Three that seems to be sliding from Red One's right shoulder, Pink Five that seems to be performing a superkick, Green Two who seems to be levitating from Red One's left shoulder and Yellow Four. The title card is also seen in the bottom right of the screen. After the break, Bio Robo is shown who seems to be running and holding the bio sword. The Title Card can be seen on the bottom left of the screen.
* FinishingMove: The Biomen and [=BioRobo=] have a plethora of them. [=BioRobo=] actually had the largest number of individual sword finishers of any Sentai mecha.
* GenderedOutfit: Overlapped with NonStandardCharacterDesign, Yellow Four and Pink Five's suits have color pattern designed to resemble a leotard, instead of having a skirt or MiniDressOfPower like the vast majority of female rangers. This also happened with the respective female duos from the [[Series/DengekiSentaiChangeman next]] [[Series/ChoushinseiFlashman two]] Sentai teams.
* HomeBase
* HumongousMecha: The mecha components were reduced to just two this time.
** CombiningMecha: Bio Jet 1 (Red and Pink) + Bio Jet 2 (the rest) = Bio Robo
* InTheNameOfTheMoon: The individual names, followed by "One! Two! Three! Four! Five! [=ChouDenshi Bioman!=].
* LawOfChromaticSuperiority: Shirō can understand animals, but nobody else is shown to have unmorphed powers.
* MakeMyMonsterGrow: Absent. Gear has five human-sized monsters called the Junoids, which they use over and over and a different giant mecha in each episode. As this prevented the giant monsters from getting much screentime (and thus Toei from getting much of a return on investment), this approach was largely unique to ''Bioman'' until future seasons that avert it as well, such as ''[[Series/TokusouSentaiDekaranger Dekaranger]]'' and ''[[Series/TokumeiSentaiGoBusters Go-Busters]]''.
* MidSeasonUpgrade: Gear switches to stronger piloted mechs and upgrade the Big Three, so the Biomen receive an extra-boost in Bio Particles[[note]]resulting in them and the Bio Robo reverting to a singular FinishingMove each[[/note]]. The three remaining Beastnoids are also rebuilt into stronger forms.
* {{Mooks}}: Mechaclones.
* MonsterOfTheWeek: Giant robots known as "Mecha Gigants". From Episode 31 and onward, they're replaced by a series of newer models known as "Neo Mecha Gigants". The newer robots are also unique in that they're piloted by a member of Big Three, while the previous generation of robots (usually) were autonomous (save for one piloted by the Black Prince).
* TheMovie: Takes place some time after Episode 11 (after Jun Yabuki joins the team), but before Episode 31 (while all five Junoids are still alive).
%%* OnTheNextEpisodeOfCatchPhrase
%%* RegularCaller:
* RobotBuddy: Peebo, again.
* SixthRanger: Subverted; OneShotCharacter Shōta Yamamori doesn't stick around despite debuting in an episode titled "The Sixth Man", and even pretending to join in the group henshin.[[note]]When he does transform into the Magne Senshi during the following episode, he's BrainwashedAndCrazy by Gear.[[/note]]
* SupervillainLair: The Neograd fortress at the South Pole.
* ThemeMusicPowerUp:
* TransformationTrinket: Techno Braces
* TwoGirlsToATeam: Introduced this trope to Super Sentai with the inclusion of Yellow Four and Pink Five. This helped codify yellow as a gender-neutral color that can be worm by both male and female rangers, and established Yellow and Pink as the standard colors for a female duo.
* VillainsActHeroesReact: As is the norm for ''Super Sentai'', we generally have Gear sending out a Junoid with an EvilPlan and Mecha Gigant OnceAnEpisode, with our heroes then arriving on the scene to stop them.
* WeaponBasedCharacterization:
** SwissArmyWeapon: The Bio Swords.[[note]]Gun, Dagger, and [[CoolSword Sword]] Modes.[[/note]] Each Bioman has a unique blade mode as well.[[note]]Fire Sword for Red One, Hurricane Sword for Green Two, Elec Sword for Blue Three, Thunder Sword for Yellow Four, and Laser Sword for Pink Five.[[/note]]
** Shingo: [[PrecisionGuidedBoomerang Green Bomerang]]
** Jun: [[TheStraightAndArrowPath Yellow Arrow]], which can also enlarge into the [[{{BFG}} Bio Big Arrow]] for a FinishingMove.
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!!Tropes specific to Choudenshi Bioman

* BareHandedBladeBlock: Happens three times in episode 30 alone.
* BattleCry: Gear personnel shout "For The Man!"
* DarkerAndEdgier: Compared to ''Dynaman''. The overall tone is grittier, the Mechaclones' ability to imitate anybody is taken to horrific lengths, the focus on children is gone, Gear (especially Doctor Man) proves to be viler villains than Jashinka, and one of the heroes is killed in only the tenth episode.
* DeathByFallingOver: [[spoiler: Farrah, after receiving heavy damage, made it back to base before falling down the stairs and exploding.]]
** [[spoiler: Pretty much every main villain dies by falling over and exploding in the last three episodes.]]
* EasyAmnesia: Happens to Peebo in episode 34 after a explosion.
* ElementalPowers: The Biomen's swords are powered by this.
** PlayingWithFire: Shirō's Fire Sword.
** BlowYouAway: Shingo's Hurricane Sword.
** ShockAndAwe: Ryūta's Elec Sword and Mika/Jun's Thunder Sword.
** HolyHandGrenade: Hikaru's Laser Sword.
* EvilWillFail: Defied. [[spoiler:Doctor Man sees the Big Three's coup coming, survives, and removes their independence, making Gear one of the more stable villain groups in the franchise.]]
** That said, Gear's repeated attempts to get Silva to work together with them and/or acquire Balzion for their own purposes always ends in failure (since [[NotInThisForYourRevolution Silva doesn't care about anything but killing the Biomen, and sees Gear as simply getting in the way of his goal]]), and it's Silva who ends up killing the Big Three.
* FakeShemp: For Mika's last episode, her voice was dubbed over by an uncredited Creator/MayumiTanaka as Yuki Yajima had only completed [=ADR=] for the first nine episodes.
* ForgottenFallenFriend: Mika is never mentioned after her death (save for one time in Episode 37, and even then they only mention her by her codename) and it seems as if Jun has always been Yellow Four instead. Although this is understandable, considering Yuki Yajima's abrupt departure from the series.
* FourIsDeath: The first Yellow Four, who was killed off after her actress left the set.
* HeroKiller: Silva, which leads to...
** HeroicBSOD: Peebo is ''terrified'' of Silva when he first appears, running away and getting as close to a fetal position as he can. (He recovers enough by the end of the episode to assists the team. From a distance.)
* IdenticalGrandson: The ancestors of the team who were showered with the Bio-Particles are played by the same actors as their descendants. This became a bit problematic for the show's creators once Mika was replaced with Jun, which is probably why the ancestors were never shown again and the repeated showings of the first flashback were often edited to leave out Mika's ancestor.
* InfiniteSupplies: How the Biomen can live without jobs.
* JumpedAtTheCall: A little subversion. At first, Shirou, Shingo, Ryuuta, Mika and Hikaru didn't quite buy Peebo's story, until Gear attacks and forces them to morph and eventually accept their duty...[[RefusalOfTheCall except Mika who went away]], only to eventually rejoin next episode.
* KickTheDog: Did you have to go and ''blow up Red One's bird?'' (However, it was less ForTheEvulz and because of the chance of Red One using his Dr. Dolittle skills to ask the bird about the evil plan du jour.)
* LoadBearingBoss: [[spoiler:Completely averted at the end. After Dr. Man is killed and the Biomen leave Neo Grad, the empty fortress ends up being quietly buried by a snowstorm, essentially becoming an icy symbolic grave.]]
* LoveTriangle: Mason, Farrah and Monster.
* NatureVersusTechnology: Would ''seem'' to be the main theme of the show, since despite their activities being enabled by a pair of robots, the '''Bio'''men are living people, while their enemies are all robots or cyborgs who've abandoned their humanity in exchange for power.
* NeverTrustATitle: [[spoiler: Episode 28 is named "The Assassination of Doctor Man". The Big Three tried to kill him because they learned he started as a human instead of a Mecha-Human. But they only killed a body double. Doctor Man expected this attempt, and the Big Three get their memories of Doctor Man being human erased.]]
* NonIndicativeName: No, this series does not have a BioPunk theme, it's focused on robots.
* OddlyNamedSequel2ElectricBoogaloo: The third Sentai season that doesn't use the word "Sentai" in its title, following ''Series/JAKQDengekitai'' and ''Series/BattleFeverJ''.
* OhCrap: Happens when [[spoiler:the villains realize their plan to assassinate Doctor Man didn't work.]]
* PunnyName: Blue Three's name[[note]]ブルー・スリー[[/note]] is spelled the same way in Japanese as "Creator/BruceLee"[[note]]ブルース・リー[[/note]], the only real difference being the placement of the middle dot.
** [[Manga/AzumangaDaioh So where's Blue One and Two?]]
* TheRemnant: Silva is this, as he was programmed by the Anti-Bio Union to destroy anything with Bio Particles. Even despite the planet's destruction long ago, he's still fighting the Bioman because of their Bio Particles; Peebo attempted to explain he didn't have to do this anymore, but Silva kept at it.
* ReplacementGoldfish: The Black Prince, a Mecha Clone replica of [[spoiler: Doctor Man's son, Shuichi. Subversion since he is actually alive.]]
* SelfFulfillingProphecy: The Anti-Bio Union was formed because they feared the potential of Bio Particles, which they believed could lead to the destruction of Bio. Their crusade to wipe out Bio Particles lead to a war [[{{Irony}} that resulted in the destruction of the very planet they wanted to protect]].
* SleevesAreForWimps: Shingo and especially Nambara spend a lot of episodes wearing sleeveless shirts.
* SoulJar: One Robot Monster had a counterpart Mechaclone, a girl named Miki, whose existence allowed him to regenerate damage. [[spoiler:She did a HeroicSacrifice to stop that.]]
* TheStarscream: [[spoiler: Mason attempted a coup... only to learn Doctor Man was ready for it.]]
* SuicideAttack: One episode had Gear use the Mechaclones as walking bombs.
* TemporarySubstitute: Episodes 15 and 16 were obviously written with Mika in mind.
* TomboyAndGirlyGirl: Mika, then Jun, and Hikaru.
* UndyingLoyalty: Mecha-Clone Ichigō to Doctor Man. [[spoiler: After their reprogramming, the Big 3.]]
* UnfriendlyFire: Mason, using Metal Megas, blasts the Biomen ''and'' the five Beastnoids, [[spoiler:which destroys Aquaiger and Messerbeast.]]
* WasOnceAMan: [[spoiler:There's a [[MeaningfulName reason]] why the villain's named Doctor ''Man''.]]
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