- HD 1080
- Runtime: 117m.
- Status: Released
- 2
- Languages: fr
- Country: France
- Director: Henri-Georges Clouzot
- Stars: Véra Clouzot, Simone Signoret, Paul Meurisse, Charles Vanel, Jean Brochard
- keywords: wife, female lover, morgue, swimming pool, gay interest, teacher, plan gone wrong, mistress, french noir, boys' boarding school, headmaster, philanderer, mischievous children, missing body, abusive husband, abused wife, wicker trunk, frightened woman
- Production_studio: Véra Films, Filmsonor
- Slogan: See it, be amazed at it, but... BE QUIET ABOUT IT!
- providers: Max, Max Amazon Channel, Criterion Channel
- The Diabolique is featured in the top rankings of 1955
- #1 in Top Thriller Movies of 1955
- #1 in Top Mystery Movies of 1955
- #1 in Top Horror Movies of 1955
The cruel and abusive headmaster of a boarding school, Michel Delassalle, is murdered by an unlikely duo -- his meek wife and the mistress he brazenly flaunts. The women become increasingly unhinged by a series of odd occurrences after Delassalle's corpse mysteriously disappears.