To provide a game machine capable of not only performing an innovative presentation motion with the minimum consumption of a memory space, but also smoothly performing a motion after the presentation motion.

An accelerating rotation motion to gradually increase a rotation speed of a stepping motor is achieved by alternately repeating a low-torque driving where a drive winding with a relatively small number of energized drive-winding turns out of drive windings of the stepping motor is used and a high-torque driving where a drive winding with a relatively large number of energized drive-winding turns out of the drive windings of the stepping motor is used while shifting the drive winding in energization. A time ratio TL/TH of a duration time of the low-torque driving TL to a duration time of the high-torque driving TH is set in a range of 1/40 to 1/2, and the accelerating rotation motion is achieved by gradually increasing the time ratio TL/TH.