->'''J.D. Sheldrake''': Ya know, you see a girl a couple of times a week, just for laughs, and right away they think you're gonna divorce your wife. Now I ask you, is that fair?
->'''C.C. Baxter''': No, sir, it's very unfair... Especially to your wife.

The Oscar-winner for Best Picture of 1960, ''The Apartment'' stars Jack Lemmon and Creator/ShirleyMacLaine, and was directed, produced, and co-written by Creator/BillyWilder.

A lowly office drone, C.C. "Buddy Boy" Baxter, has just found the solution to getting up the corporate food chain: let the corporate bigwigs use his apartment for their extramarital affairs. His boss, J.D. Sheldrake finds out, and promotes Baxter on the condition that he lets him use the apartment for his own affair. Naturally, Baxter accepts the condition, but things turn very complicated when he finds out his crush, Fran Kubelik, is Sheldrake's other woman.

The film would later go on to be adapted as a 1968 musical, titled ''Promises, Promises''.
!!This film provides examples of:

* AcademyAward
* BetterLivingThroughEvil: What Sheldrake gives Baxter.
* BreakUpMakeUpScenario: When Baxter proves to Fran that he is a "mensch".
* BungledSuicide: Baxter tells Miss Kubelik he attempted suicide once, and ended up accidentally shooting himself in the knee.
* CatchYourDeathOfCold: Baxter is forced to sleep in the park for hours until someone is through with the apartment, and he gets a nasty cold and fever.
* ChekhovsGun: "...And I've already [[spoiler: taken a sleeping pill]] so I'm afraid the answer is no?"
** The key to the executive washroom.
* CorruptCorporateExecutive: J.D. Sheldrake.
* DeliberatelyMonochrome: Until ''SchindlersList'', this was the last black and white film to win Best Picture.
* [[DidIMentionItsChristmas Did I Mention It's Christmas?]]
* DoggedNiceGuy: Baxter
* DrowningMySorrows: Baxter, when he learns Miss Kubelik is Mr. Sheldrake's other woman.
* EspeciallyZoidberg: This exchange:
-->'''Baxter:''' You're not going to bring anybody to my apartment.
-->'''Sheldrake:''' I'm not just bringing anybody; I'm bringing Miss Kubelik.
-->'''Baxter:''' ''Especially'' not Miss Kubelik.
* GrewASpine: [[spoiler:Baxter eventually refuses to loan his apartment to Sheldrake again, and quits instead.]]
-->[[spoiler:'''Sheldrake:''' What's gotten into you, Baxter?]]
-->[[spoiler:'''Baxter:''' Just following doctor's orders. I've decided to become a mensch. You know what that means? A human being.]]
* IUhYouToo: Baxter confesses his love to Miss Kubelik while they play Gin Rummy. She responds with this classic line:
-->"Shut up and deal."
* InterruptedSuicide: [[spoiler: Miss Kubelik tries to kill herself when she realized Mr. Sheldrake didn't really love her back. Baxter and Dr. Dreyfuss prevent her from becoming an example of DrivenToSuicide.]]
* KarmaHoudini: The four executives who were using Bud's apartment. They take advantage of Baxter, cheat on their wives with ridiculous frequency and in the end [[spoiler:only Bud gets punched in the face.]]
* LastNameBasis: Bud and Fran always refer to each other as "Miss Kubelik" and "Mr. Baxter" - even when he tells her that he loves her, he uses her last name. [[LampshadeHanging Lampshaded]] by Dr. Dreyfuss:
-->"Mister, Miss. Such politeness."
* LoveTriangle: Baxter loves Miss Kubelik, Miss Kubelik loves Sheldrake, Sheldrake just wants a bit on the side. In the end [[spoiler:Miss Kubelik leaves Sheldrake when she hears that Baxter finally stood up to him, and goes running to Baxter's apartment.]]
* MaybeEverAfter: "Shut up and deal."
** "I'll send him a fruitcake every Christmas."
* TheMistress: Miss Kubelik.
* MoralMyopia: The other executives -- who are cheating on their wives and depriving Baxter of his home whenever it suits them in order to do so -- get outraged and act as if they're the ones being wronged when Baxter finally pulls the plug for them.
* NewYearHasCome: The climax happens at midnight.
* NiceHat: Baxter gets a bowler hat after his promotion.
-->"It's what they call the 'junior executive' model."
* PlayingAgainstType: Fred [=MacMurray=] as J.D. Sheldrake - back then, he was known for roles in family films (despite also starring in thrillers such as Wilder's own ''DoubleIndemnity'').
* PrettyInMink: Fran has a coat with a huge lynx collar.
* RaceForYourLove: In the end, Miss Kubelik [[spoiler:leaves Sheldrake on New Year's Eve and runs to Baxter's apartment]].
* SantaClaus calls in at the bar where Baxter is drowning his sorrows, but his cheerful wisecracking is no match for the glum stare that Baxter gives him. At the end of the night we see Santa himself sitting morosely at the bar, all alone. [[CrappyHolidays So much for Christmas in New York!]]
* ScreenToStageAdaptation: Adapted as the Broadway {{musical}} ''Theatre/PromisesPromises'', with a book by Neil Simon, music by Burt Bacharach and lyrics by Hal David.
* ShoutOut: The shot where the camera swoops in to find Baxter at one in a sea of desks is a {{homage}} to King Vidor's 1928 silent classic, ''TheCrowd''.
** Trying to schedule a tryst with one of the company switchboard operators, one of the bosses suggests they meet at the apartment on Thursday night. "Thursday? But that's ''Series/TheUntouchables'' with Bob Stack!"
** Baxter attempts to watch ''GrandHotel'' on television but gives up when it keeps getting interrupted by commercials.
** Baxter gets tickets to ''TheMusicMan'' from Sheldrake and tries to take Miss Kubelik to the show.
** One of Billy Wilder's own earlier films gets a Shout Out when Kirkeby tells Dobisch about Miss Kubelik staying at Baxter's apartment:
--->'''Dobisch:''' No kidding. Buddy-boy and Kubelik having themselves a little toot!
--->'''Kirkeby:''' Toot? More like a [[TheLostWeekend lost weekend]]. Neither of them showed up for work today.
* StalkerWithACrush: Baxter's rather unnervingly thorough knowledge of Miss Kubelik hints at this.
* SuddenPrincipledStand
* TakeThat[=/=]NoCelebritiesWereHarmed: TheDitz that Dobisch takes to the apartment is a thinly veiled lampoon of MarilynMonroe. Billy Wilder had earlier directed Monroe in ''TheSevenYearItch'' and ''SomeLikeItHot'', and didn't think much of her professionalism. [[LampshadeHanging Lampshaded]] when Dobisch even mentions that the girl looks like Marilyn Monroe.
* UnfortunateImplications: Deliberately invoked in-universe when Sheldrake hands Miss Kubelik the money.
* UnsympatheticComedyProtagonist: Baxter, at least initially.
* UrbanLegendLoveLife: Baxter's neighbors see all the girls cycling through the apartment and come to the conclusion that he's TheCasanova.
* VerbalTic: The office workers in the film have the habit of adding -wise to words. At one point, Baxter even says "otherwise-wise".
** The {{tagline}} on the movie's original poster: "Movie-wise, there has never been anything like ''The Apartment'' love-wise, laugh-wise, or otherwise-wise!"
** Wilder and I.A.L. Diamond's screenplay ends thusly, following Miss Kubelik's "Shut up and deal" line:
--->"Bud begins to deal, never taking his eyes off her. Fran removes her coat, starts picking up her cards and arranging them. Bud, a look of pure joy on his face, deals -- and deals -- and keeps dealing.\\
And that's about it. Story-wise."
* YiddishAsASecondLanguage: Dr. Dreyfuss encourages Baxter to "be a ''mensch''", while Mrs. Lieberman opines that the bad weather "must be from all that ''mishegoss'' at Cape Canaveral".
* YourCheatingHeart