To provide a game machine prevented from the initialization of memory and consequent deletion of current game data caused by the malfunction, misoperation, fraudulent operation, or the like, of a game machine controller or the malfunction, fraudulent operation, or the like, of an initialization instructing means provided on the game machine.

This game machine comprises an initialization prohibiting means (circuit composed of a controller 1, a signal input unit 4, photocouplers 5A and 5B, a power-off relay 7, an OR element 9 and an inverter element 10), wherein the controller 1 (especially an initialization prohibition executing unit 400) has a function of performing the RAM initialization prohibition process with this circuit in response to a signal from a game machine administrator device S.