Guyver: Dark Hero is a 1994 American tokusatsu superhero film based on the manga and anime, Bio Booster Armor Guyver. It is a sequel to the 1991 film The Guyver. Written by Nathan Long and directed by Steve Wang, the film stars David Hayter in the title role, replacing Jack Armstrong.

Bio-Booster Armor Guyver or simply Guyver is a Japanese manga series written and illustrated by Yoshiki Takaya. The Guyver itself is a symbiotic techno-organic device that enhances the capabilities of its host.