| 摘要 |
PROBLEM TO BE SOLVED: To provide a pachinko machine where a device for surely detecting the number of game balls shot into a game part is easily attached. SOLUTION: An optical sensor is attached to plywood to be the game board of the pachinko machine via an attachment bracket from the rear surface of the plywood by arranging detection holes 16 at positions corresponding to shot ball guide passage 26 where the pachinko ball passes through and also at positions corresponding to the place just before the shot of the ball into the game part. In this case, the detection holes 16 are protected by permitting the guide passage 26 formed by rails 22 to be a light permeable member.
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