Man-Made Monster is a 1941 American science-fiction horror film directed by George Waggner and produced by Jack Bernhard for Universal Pictures. Filmed in black-and-white, it stars Lon Chaney Jr. (in his horror film debut) and Lionel Atwill. Man-Made Monster was re-released under various titles including Electric Man and The Mysterious Dr. R. Realart Pictures re-released the film in 1953 under the title The Atomic Monster as a double feature with The Flying Saucer (1950). On the film's original main title, there is no hyphen; it's simply Man Made Monster.

The plot resembles The Invisible Ray (1936), The Walking Dead (1936), and two decades later Indestructible Man (1956); that much later feature starred Chaney but was not directly inspired by Man-Made Monster.