Frankenstein is a 1931 horror film based on the work by Mary Shelley. The film tells the story of a scientist named Dr. Henry (Victor in the novel) Frankenstein whose work takes him into the dark side of life after death. It stars Colin Clive, Mae Clarke, John Boles and Boris Karloff (billed only with a question mark in the opening credits).

The movie was adapted by John L. Balderston, Francis Edward Faragoh, Garrett Fort, Robert Florey (uncredited) and John Russell (uncredited) from the Shelly novel and the play by Peggy Webling. It was directed by James Whale and has been selected for preservation in the United States National Film Registry.

Frankenstein was followed by the 1935 sequel Bride of Frankenstein.