Ratman is a 1988 Italian horror film.
Ratman, Rat-Man or Rat Man can also refer to the following:
Rat-Man (comics), an Italian comic book series by Leonardo Ortolani, and its title character Ratman (manga), a Japanese manga by Sekihiko Inui, and its title character Rat Man, a nickname given by Sigmund Freud to one of his patients "Ratty" Erwins, also known as "The Rat Man", a character in Stephen King's The Stand Ratman, a character in the animated series Dexter's Laboratory from the 1996 episode "The Justice Friends: Ratman" "Rat Man", a nickname and alter-ego of Japanese serial killer Tsutomu Miyazaki