PURPOSE: To easily maintain and check various constituting parts such as a warm, warm gear and ball stop disk, etc., by fitting a rotation transmitting mechanism part to a base member so as to be attached and detached, engaging a drive gear and a driven gear and facing the ball stop disk to the route of prize winning balls.

CONSTITUTION: Ball stop disks 16a and 16b are housed from an opening 75 of a base material 70 into the internal part of a hollow space and a recessed part 161 is faced to prize winning ball routes 74a and 74b. Afterwards, a cylindri cal hole 921 of a fitting part 92 in a housing 82 is fitted to a projecting part 78 of the base material 70. Further, a drive gear 12 and a driven gear 13 are engaged, afterwards, a screw 15 is inserted to a screw inserting hole 922 of the fitting part 92, screwed to a screw hole 77 of the projecting part 78 and fastened. When a motor 10 is rotated, the drive gear 12 rotates the driven gear 13 and the driven gear 13 rotates the ball stop disks 16a and 16b through a warm 83 and a warm gear 84. Accordingly, the prize winning balls arranged in the prize winning ball routes 74a and 74b can be alternatively discharged to a lower prize winning ball discharge beam one by one. Thus, a whole device can be easily cleaned, maintained and checked.