The Ninth Gate
- Tahun: 1999
- Negara: Spain, France
- Genre: Mystery, Thriller, Horror
- Studio: R.P. Productions, Orly Films, Bac Films, Kino Visión, Origen Producciones Cinematograficas, Vía Digital, Canal+, TF1 Films Production
- Kata kunci: hotel, new york city, suicide, library, portugal, obsession, southern france, investigation, antiquary, picture puzzle, castle, satanism, collector, lucifer, devil, demon, millionaire, book store, occult, rare book, devil worship, gnosticism, bibliophilia
- Pengarah: Roman Polanski
- Pelakon: Johnny Depp, Frank Langella, Lena Olin, Emmanuelle Seigner, Barbara Jefford, Jack Taylor