The Manster
- Ano: 1959
- País: United States of America, Japan
- Xénero: Horror, Science Fiction
- Estudo: Lopert Pictures Corporation, Shaw-Breakston Enterprises, United Artists of Japan, William Shelton
- Palabra clave: monster, transformation, mad scientist, murder, police investigation, two-headed monster, scientific experiment
- Director: George P. Breakston, Kenneth G. Crane
- Reparto: Peter Dyneley, Jane Hylton, 中村哲, Terri Zimmern, Norman Van Hawley, ジェリー伊藤