PURPOSE: To constitute the device so that an inexpensive actuator can be utilized, and also, miniaturization of the whole can be realized by providing separately a hammer mechanism for energizing a hammer to a start position, and a hammer hitting mechanism for beating repeatedly the rear end of the hammber.

CONSTITUTION: In a ball discharge rail 1 of a Japanese pinball game (PACHINKO) machine, a ball 2 is supplied successively one piece each to a receiving plate 1a in its rear end, and in the rear part of the receiving plat 1a, a hammer mechanism A is provided. This hammer mechanism A is constituted by supporting axially so as to be freely slidable a piston-like hammer 5 by a bearing 4 in the rear of the inside of a housing 3 fixed to the receiving plate 1a, and providing a collar 6 in the middle, and providing a collar 7 in the rear part by protruding it from the rear end of the housing 3. Also, between this collar 7 and the rear end of the housing 3, a spring part 8 for energizing the hammer 5 to the rear is provided. In order to hit this hammer 5, a hammer hitting mechanism B is provided, and it is provided with a hitting lever 13 for turning in the direction indicated with an arrow at the time when a rotary solenoid 11 is turned on, and it discharges the ball 2 by hitting the rear end of the hammer 5.