Not of This Earth is an independently made 1957 American black-and-white science fiction film produced and directed by Roger Corman (for his Los Altos Productions), that stars Paul Birch, Beverly Garland, Morgan Jones, William Roerick, and Anna Lee Carroll. The film was written by Charles B. Griffith and Mark Hanna and was distributed by Allied Artists Pictures Corporation as a double feature with Attack of the Crab Monsters. Its theatrical release had a running time of 67 minutes, that was expanded to 70 minutes in 1962 for TV syndication.

The storyline concerns the attempts by an extraterrestrial humanoid to surreptitiously secure the blood of humans and to test it on himself as a treatment for a fatal blood disorder which is ravaging the population of his home planet, Davanna.