La chiave
- År: 1983
- Land: Italy
- Genre: Drama, Romantik
- Studio: Selenia Cinematografica, International Video Service, San Francisco Film
- Nøgleord: infidelity, jealousy, husband wife relationship, sexual obsession, obsession, key, fascism, diary, perversion, sexploitation, photograph, older man younger woman relationship, lust, desire, extramarital affair, obsessive love, cuckold, exhibitionism, erotic movie
- Direktør: Tinto Brass
- Cast: Stefania Sandrelli, Frank Finlay, Franco Branciaroli, Barbara Cupisti, Armando Marra, Maria Grazia Bon