PURPOSE: To simplify the assembling man-hours of a pinball machine and to disperse work by, for example, utilizing a subcontract, etc., by forming a ball supply device which supplies the ball of the pinball machine one by one to a shooting part on a shooting rail and a mounting base integrally by installing component groups for ball shooting collectively.

CONSTITUTION: A ball controller 9 installed at the upper side of a collecting drain 8a, and a ball shooting device S installed by tightening the mounting base 10 on the back plane of the front frame 1c of the pinball machine with a screw are provided. In the ball shooting device S, the component group 11 for ball shooting and the ball supply device 12 are loaded integrally on a sheet of mounting base 10. The ball supply device 12 is formed by loading the mounting base 10 fasing upward on an upper plate 10a extending in crank shape, and is arranged at a lower playing plate 7b sandwiching the shooting rail 18. Also, the start terminal part of the shooting rail 18 is fixed by using one plane of the upper plate part 10a of the mounting base 10.