Robot Jox is a 1990 American post-apocalyptic Mecha science-fiction film directed by Stuart Gordon and starring Gary Graham, Anne-Marie Johnson and Paul Koslo. Co-written by science-fiction author Joe Haldeman, the film's plot follows Achilles, one of the "robot jox" who pilot giant machines that fight international battles to settle territorial disputes in a dystopian, post-apocalyptic world.

In science fiction, mecha or mechs are giant robots or machines typically depicted as piloted and as humanoid walking vehicles. The term was first used in Japanese after shortening the English loanword 'mechanism' or 'mechanical' , but the meaning in Japanese is more inclusive, and 'robot' or 'giant robot' is the narrower term.