To prevent ball clogging at the downstream side end part of an trough.

Near the downstream side end part of the alignment trough 4 for aligning game balls P stored in a ball tank 2, a game ball release area 11 is provided for securing a prescribed gap between the tips of teeth of a sprocket 9 and the alignment trough 4. After the tips of the teeth of the sprocket 9 touch the game balls P and temporarily regulate the downward flow thereof, with the rotation of the sprocket 9, the game balls P are allowed to flow down one by one via the game ball release area 11. Thereby, ball clogging between the tips of the teeth of the sprocket 9 and the alignment trough 4 is prevented.