PURPOSE: To provide a slot machine that displays instruction information effectively for players.

CONSTITUTION: On an image display 40, a game image stored in a game image storage means 141 and an instruction image stored in an instruction image storage means 142 are displayed alternately. Images are switched by an image switching means 145 according to an operation condition of the slot machine which is detected by an operation condition detection means 143. When no-game condition is detected by the operation condition detection means 143, an image switching control means 144 allows an image switching switch 120 to switch images, and when the image switching switch 120 is operated 10 an image switching allowable condition, an image displayed on the image display 40 is switched to a new image for a certain period of time.