A game machine allowing a player to preferably play a game using a controller which is equipped with only a smaller number of operation members, instead of a different type of controller. A controller type determining section (40) determines a type of a controller connected to a home-use game machine. Further, the table storage section 44 stores a key assigning table for each type of a controller, showing types of operation signals input from a controller and types of actions to be performed by an operation target of the controller. A table reading section (42) reads out a key assigning table correlated with the type of a controller connected to the home-use game machine (12) from a table storage section (44).