To provide a structure in which the sheathed wires of a plurality of ball detectors do not interfere with balls discharged from a plurality of winning parts.

The plurality of winning parts 3; 4; 5 are provided on the front side of an attaching board 2, a connector board 27 is provided on the rear side of the attaching board, and a plurality of electric components such as a left variable ball detector 12, a right variable ball detector 13, an electromagnetic solenoid, a left general ball detector 22 and a right general ball detector 25 are intensively wired to the connector board 27 by the respective sheathed wires 44; 54; 63 and a leader line 67. The sheathed wire 44 connecting the left general ball detector 22 and the connector board 27 is inserted from the back side of a projection part 43 to a left wiring path part 41, and the sheathed wire 54 connecting the right general ball detector 25 and the connector board 27 is inserted from the back side of the projection part 53 to a left wiring path part 42. Since the sheathed wires 44; 54 do not interfere with the balls passing through the path of balls in the winning parts 3-5, ball detection signals electrically output from the sheathed wires 44; 54 are supplied to a controller without including electric noise.