To quickly and reliably inform a player of a bullet shortage condition without impairing reality as a shooting game.

In this device, when a bullet shortage condition is caused in a game, a signal to a solenoid type actuator 35 from a game device main body 11 is turned off, and a magazine 29 automatically jumps out of a gun main body 27. Therefore, a player can quickly and reliably know the bullet shortage condition other than an image. Since loading operation is operation to incorporate the magazine 29 into the gun main body 27 like a real gun, an effect of enhancing reality as a game can be attained.