Il mostro di Frankenstein (transl. The Monster of Frankenstein) is a 1921 Italian silent film directed by Eugenio Testa. The film features actor Luciano Albertini as Baron von Frankenstein and Umberto Guarracino as The Monster. Albertini was known for his strong-man films at the time, particularly the Sansone film series. The film is a lost film, with only a photo, some promotional materials, and a single published review left to give insight to what the film was.

After the film's release, it became the last Italian production for Albertini-Film, which seemingly re-located to after this film. Critics and film historians have sometimes credited the film as an early example of a horror film, while others stated there wasn't enough evidence to truly know what kind of film style it was attempting.