To solve the often occurring problem that by a conventional technique, when a trouble occurs, a repair is required, and the connected wiring becomes an obstacle, and also, is tangled or the like.

In a game machine which hits and launches a game ball by a launching hammer, this game ball replenishing device 1 is provided on a case lid body 4 on the opening/closing side which is one of a set case 5. The set case 5 can be open/close-divided on the fixed side and the opening/closing side through a hinge section 9, and is freely openable/closable between the front and the rear. In this case, the game ball replenishing device is a ball feeding mechanism under an electromagnetic solenoid motion configuration which consists of an electromagnetic solenoid 6 and a movable piece and so forth, and is operated based on the ball hitting operation. Contact members are provided on the hinge sections 9 of the fixed side case body 3 and the opening/closing side case lid body 4 to beak/connect the circuit to the solenoid 6 so that energization of the electromagnetic solenoid 6 makes a loop of wiring.