To provide an antifoul structure of a transfer trough in a pachinko island, preventing dirt adhering to a pachinko ball from being transferred to the base of the transfer trough.

In this antifoul structure of the transfer trough in the pachinko island, the base 33a where the pachinko balls of a collecting trough 15 disposed in the pachinko island roll is wound like a roll, and a part thereof is covered with a draw-out part 31a of a belt-like body 31 extended in the longitudinal direction of the collecting trough.