PURPOSE: To utilize the advantage that a reel and a background can be freely set by a display in a display type slot machine, and enhance the interest of a slot machine of this kind.

CONSTITUTION: In a display type slot machine for displaying the rotating states of a plurality of reels on a display together with a background image, both a reel image signal and a background image signal are generated according to the reel control information from a reel control information generating means 1 for generating the rotation and stop information of a plurality of virtual reels, and the reel image signal and the background image signal are combined together and displayed on a display D.