During a slot machine game, game effects are also displayed on a liquid crystal panel 39d provided in a reel display window unit 39, and thus the liquid crystal panel 39d serves as a new machine component for performing game effects. Therefore, new effects for the game can be performed on the liquid crystal panel 39d, which facilitates maintaining the novelty of game effects. Further, the openings 5b, 6b and 7b are formed corresponding to the rows of the variable displays of the symbols. Accordingly, by means of the light guiding plates 39g also located between the opening 5b and the opening 6b, and between the opening 6b and the opening 7b, the light from the cold-cathode tubes 40a is guided toward the liquid crystal panel 39d. Consequently by means of the liquid crystal panel 39d in areas between the respective display windows 5-7, light luminance can be obtained.