To prevent a colored layer provided on a mount base plate of a winning device from coming off by passage or the like of a game ball with time.

A winning device of a Pachinko machine includes a mount base plate 20 mounted on the board face of a game board along the board face and a ball bearing part 30 for receiving game balls provided on the mount base plate 20. The mount base plate 20 is a light guide plate 20 made of a light transmissive synthetic resin. On the back of the light guide plate 20, a light reception part 24 to which light from a light source 52 disposed at the rear of the light guide plate 20 is provided. A colored layer 27 for reflecting light is provided at a part excluding the light reception part 24. Further, a reflection means 25 for reflecting light from the light source 52 that has entered the light reception part 24 in a direction along a plate surface of the light guide plate 20 is provided on the light guide plate 20.