Ben is a 1972 American horror film directed by Phil Karlson and starring Lee Montgomery, Joseph Campanella, and Arthur O'Connell. It is a sequel to the film Willard (1971). The film follows a lonely boy named Danny Garrison who befriends Willard's former pet rat named Ben. Ben becomes the boy's best friend, protecting him from bullying and keeping his spirits up in the face of a heart condition. However, Ben forms an army of deadly rodents while the police attempt to control it.

The film premiered on June 21, 1972 in California and was given a wide release on June 23.

Ben was released on June 23, 1972 by Cinerama Releasing Corporation, and received mixed reviews from the critics.

American singer Michael Jackson performs the theme song of the film, also titled "Ben". The song is also included on his 1972 album of the same name.