PURPOSE: Not to vary a random number value corresponding to starting storage, and also, to clarify a great hit probability value in the case of the kind of a machine of probability fluctuation by executing the extraction of a numerical value for determining a result of display of a picture pattern of a variable display device by the timing after a prescribed time elapses from starting to rotate the picture pattern of the variable display device.

CONSTITUTION: The game machine is provided with an accessory control circuit panel 107 for extracting a prescribed number of numerical values at a random timing from a numerical value updated in a prescribed period, and determining a result of display of a picture pattern of a variable display device 62, based on the extracted numerical value, and a game is executed, based on the result of display of the picture pattern of the variable display device 62 determined by the accessory control circuit panel 107. In this case, this game machine is provided with an accessory CPU being an extraction timing control means for controlling so as to execute the extraction of the numerical value by the timing after a prescribed time elapses from starting to rotate the variable display device 62. Also, the accessory control circuit panel 107 executes a decision of an extracted random number by the timing commanded by the accessory CPU, and also, has a function for varying a probability value of a great hit.