To provide a medal game machine that can easily prevent illegal delivery of medals performed by delivering the specified number of medals or more by rotating a rotary disc by inertia even after the stop of a motor.

A medal game machine is provided with a counting means 73 for counting the number of delivered medals on the basis of a medal detection signal (a) from a delivered medal sensor 33; an illegality detection means 90 (such as a medal number comparing means 74 and an illegality signal generating means 81) comparing a medal count signal (b) from the counting means 73 with a medal delivery signal (a) from a game control means 71 and outputting an illegality detection signal in the case of the count value of the counting means 73 exceeding the specified number of medals delivered on the the medal delivery signal (a); and an illegality detection means 90 actuated on the basis of the illegality detection signal from the illegality detection means 90.