How to Make a Monster is a 1958 American horror film drama. It was produced and written by Herman Cohen, directed by Herbert L. Strock, and starring Gary Conway, Robert H. Harris, Paul Brinegar, Morris Ankrum, Robert Shayne, and John Ashley. The film was released by American International Pictures as a double feature with Teenage Caveman. It is notable for its inclusion of props and studios that created actual sci-fi horror movies.

The film is a follow-up to both I Was a Teenage Werewolf and I Was a Teenage Frankenstein. Like Teenage Frankenstein, a black-and-white film that switches to color in its final moments, How to Make a Monster was filmed in black-and-white and only the last reel (the fire scene finale) is in full color.