Fiend Without a Face is a 1958 independently made British black-and-white science fiction-horror film drama from Amalgamated Productions. It was produced by John Croydon and Richard Gordon, directed by Arthur Crabtree, and stars Marshall Thompson, Kynaston Reeves, Michael Balfour, and Kim Parker. The film was released in the U.K. by Eros Films; in the U.S. it was released in June 1958 by MGM as a double feature with The Haunted Strangler.

Fiend Without a Face tells the story of mysterious deaths at the hands of a mentally created invisible life form that feeds on atomic power and then steals human brains and spinal columns to use as bodies in order to multiply its numbers.

The screenplay by Herbert J. Leder was based upon Amelia Reynolds Long's 1930 short story "The Thought Monster", originally published in the March 1930 issue of Weird Tales magazine.