To provide a ball paying-out device of a pachinko machine capable of preventing the tampering of inserting a wire or the like into the ball paying- out device from a front face of the pachinko machine.

In this ball paying-out device 12 of a pachinko machine provided with a ball staying means 21 capable of preventing the flowing down of the pachinko balls by coming in and out with respect to a ball path 22 where pachinko balls flow down in a line, a tamperproof member 43 for preventing the tampering to the ball staying means 21 is mounted on a lower face of the ball staying means 21 facing to the ball path 22, and kept in a tamperproof state by the ball staying means 21.