->''"It is possibly the best-known erotic film of modern times, perhaps the best. That's because it understands eroticism from the inside-out--understands how it exists not in sweat and skin, but in the imagination."''
-->-- '''Creator/RogerEbert'''

'''''Belle de Jour''''' is one of the most famous films directed by [[Creator/LuisBunuel Luis Buńuel]]. Released in 1967, it starred then-débutante Catherine Deneuve.

Séverine (Deneuve) looks outwardly like the perfect {{Housewife}}. Beautiful, demure, well-mannered and impeccably groomed, she is the very image of bourgeois propriety. In fact she is a masochist who likes to fantasize about being humiliated and treated like a sex object. On the recommendation of a friend, she acts out on these fantasies by becoming a part-time prostitute in an upscale brothel. Since she only turns tricks during her husband's business hours, she is given the moniker Belle de Jour, "daytime beauty".

!!This film provides examples of:

* AllJustADream: It's unclear what really happens and what just takes place in Séverine's overactive fantasy life.
* AllGirlsWantBadBoys
* AllWomenArePrudes: Subverted.
* BandOfBrothels: Séverine's "colleagues".
* BastardBoyfriend: Marcel.
* BlondeBrunetteRedhead: Séverine and her fellow prostitutes.
* BookEnds: Starts with a carriage, ends with a carriage.
* CovertPervert: Séverine.
* DefrostingIceQueen: Bunuel deliberately used Deneuve's appearance as a blond ice queen to emphasize the contrast between her straight-laced persona and her real inner self.
* {{Fetish}}: Séverine's is to be tied up and sexually abused by strangers.
* {{Foreshadowing}}: Pierre reflecting upon a wheelchair. [[spoiler:At the end of the movie, he's paraplegic.]]
* GainaxEnding: Not even Luis Bunuel [[ShrugOfGod himself was entirely sure what it meant.]]
* TheMafia: Marcel and another client are part of it.
* MurderTheHypotenuse: Marcel attempts this on Séverine's husband. [[spoiler:Doesn't work, and he gets killed in the process.]]
* NotIfTheyEnjoyedItRationalization: Séverine's first job.
* RiddleForTheAges: One customer shows up with a small lacquered box, the contents of which cause a prostitute to recoil in shock. We'll never know what's in it.
* SexlessMarriage
* {{Yandere}}: Marcel.