To provide a game machine which increases game characteristics by a special game which is achieved by simple control and provides game characteristics hardly boring a player.

In a slot machine, a prize winning flag is turned ON corresponding to a prize won by a specific symbol combination on condition that winning of the specific symbol combination "offertory box", "ring", or "water jar" during a challenge period. During a period after finishing the challenge period, by not executing lottery processing (S55, S60, S65) with a counter to a specific symbol combination wherein the prize winning flag is turned ON, a specific symbol combination won during the challenge period generates a special game wherein a specific symbol combination is easily won. Three kinds of special games can be generated by the same control, and a plurality of kinds of special games can be achieved while facilitating the control. Because a special game wherein three kinds of specific symbol combinations easily stoppable may be generated, variation is given to a prize winning symbol combination easily stoppable in a special game to provide game characteristics hardly boring a player.