Giornata nera per l'ariete
- Taon: 1971
- Bansa: Italy
- Genre: Mystery, Thriller, Horror
- Studio: Dario, B.R.C. Produzione Film
- Keyword: based on novel or book, sexual obsession, murder, reporter, whodunit, psycho, voyeur, giallo
- Direktor: Luigi Bazzoni
- Cast: Franco Nero, Silvia Monti, Wolfgang Preiss, Edmund Purdom, Rossella Falk, Renato Romano