To provide an opportunity of the start of the winning ball delivery operation in a play control circuit, and prevent the participation in the play control circuit by the injustice such as the remodeling or the like.

The winning ball entered into one of plural winning ports, is temporarily stored in an evidence ball pool unit 8, a play control circuit 3 outputs a predetermined winning ball delivery number signal to a frame control circuit 9 on the basis of the detection of the winning balls to the winning port, and the frame control circuit delivers the winning balls by driving the winning ball delivery unit 8 on the basis of the predetermined winning ball delivery number signal from the play control circuit 3. Further the evidence ball pool unit 8 discharges the winning number as the evidence ball for one time, to an island side, to one winning ball delivery operation.