To surely transmit information from the concentration terminal board of a game machine to a hall computer.

In the game machine having a main substrate for executing processing relating to a game and the concentration terminal board including a relay to be driven by the output signals of the main substrate, when transmitting signals indicating the occurrence of an error state or the like through the concentration terminal board to the outside, the number of times of transmitting the signals is counted and it is repeated until it reaches the predetermined number of times. When the other signals are being transmitted, after standing by for the fixed time, the signals of the error state are transmitted to the outside when the transmission of the other signals is ended.

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