PURPOSE: To easily fix the rotating angle of an operation handle in a desired position by providing, on a rotation operating part side, an insert part for inserting a locking member orthogonally to its rotating direction, and a plurality of locking parts for engagingly locking and fixing the locking member in a position in which the rotation operating part is rotated.

CONSTITUTION: When a player grasps and rotates an operation handle 100, a ball emitting device starts to operate, and balls are emitted in a game area 4 along a guide rail 6 at a speed according to the rotating angle of the operation handle 100. When the emitting speed reaches a desired speed, a locking member, for example, a coin, is inserted into the insert hole 202 of the rotation operating member 320 of the operation handle 100 and set in the state where its front and rear end parts are fitted to the locking grooves 201, 204 of fixing parts (310, 330, 340), whereby the rotation operating member 320 is fixed at a rotating angle holding the emitting speed. At this time, by the action of the locking claw 1210 mounted on a mounting member 310 and the latch tooth 1329 provided on the rotation operating member 320, the rotation operating member 320 can be held in a desired rotating angle position.