To solve the problem that high-quality performance is not available when a CPU having a low processing capacity is used.

A game machine includes a memory means that stores one or more image data, a main control means for performing overall control, one or more performance means for performing a predetermined performance, a reception means for receiving a signal in accordance with an operating condition of an operation means, and a sub-control means for performing performance control. The sub-control means includes a first means that determines a performance pattern based on a command, etc. and specifies image data to be read out and a second means that reads out the specified image data from the memory means. When the first means determines a performance pattern that includes a specific performance capable of effectively receiving a command or signal, it instructs the second means to read out part or all of the image data corresponding to the specific performance up to a predetermined timing to display the image data. Owing to this structure, high-quality performance is available in the game machine.