To provide a Pachinko ball collecting gutter with a Pachinko ball detecting sensor on the collecting gutter capable of securely detecting Pachinko balls if the Pachinko balls are retained on the collecting gutter.

The collecting gutter 21 is set on an island 10 in which a plurality of Pachinko machines 14 are juxtaposed to collect Pachinko balls discharged from the respective Pachinko machines 14 to flow down to a ball lifting device 24. A level difference 21c, having the height of at least the radius of a Pachinko ball and the lower stage on the downstream side, is formed on the bottom 21b of the collecting gutter 21, and the collected ball detection sensor 34 is disposed on a side wall 21a on the downstream side from the level difference 21c to detect Pachinko balls.