Gammera the Invincible
- År: 1966
- Land: United States of America, Japan
- Genre: Gyser, Sci-fi, Action
- Studio: World Entertainment Corp., Harris Associates, Ross-Gaffney, Inc., Titan Productions, Inc., Daiei Film
- Nøgleord: japan, monster, giant monster, turtle, rampage, alternate version, kaiju, gamera (giant turtle), tokusatsu
- Direktør: Sandy Howard, 湯浅憲明
- Cast: Albert Dekker, Brian Donlevy, Diane Findlay, John Baragrey, Dick O'Neill, 船越英二