Attack of the Giant Leeches is a low-budget 1959 science fiction film from American International Pictures. It was directed by Bernard L. Kowalski, produced by Gene Corman, and the screenplay was written by Leo Gordon. The film is in black and white, and runs for 62 minutes. This film was also called Attack of the Blood Leeches, Demons of the Swamp, She Demons of the Swamp, and The Giant Leeches. In July 1992, Attack of the Giant Leeches was featured as a fourth-season episode of movie-mocking television show Mystery Science Theater 3000.