To prevent incorrect winning due to erroneous winning judgement by noise and the input of incorrect signals and to surely evade the increase of processing burdens in a game machine control part and drawn result signals missed to be taken in a game machine for performing drawing by using a drawing processing IC.

A pachinko game machine 1 is provided with the drawing processing IC 35 for performing a drawing processing at a prescribed winning probability corresponding to the input of a drawing start signal, outputting the drawn result signal from HIT0 and HIT1 terminals and outputting a validity judgement signal changed corresponding to a drawn result from an EFLAG terminal, and a CPU 34 for acquiring the drawn result signal and judging the validity of the acquired drawn result signal on the basis of the validity judgement signal. The CPU 34 inputs the validity judgement signal from an interruption terminal and acquires the drawn result signal by an interruption processing executed corresponding to the input of the validity judgement signal.