As characters move, building are rotated and deformed, then, a powerful expression as if the characters moved lively and freely in three-dimensional space.The game machine stores a first image plane for displaying a ground, a second plane for displaying images of upper surfaces of solid bodies of buildings, a third image plane for displaying the background in the graphic memory. A sprite image to be pasted on side surfaces of the buildings and other solid bodies is stored in the graphic memory.Thereby, realistic image expression is realized by displaying solid bodies with the same height.