Abstract: The gaming machine includes a plurality of main reels 3 (L, C, R), on the periphery of which are arranged a plurality of symbols; and a stop switch 7 (L, C, R) enabling input of an instruction to stop rotation of the main reels 3; in which the rotation of the plurality of main reels 3 is stopped based on the timing of the input from the stop switch 7 by a player, and the gaming machine further includes a rotation speed modification switch 101 enabling modification of the rotation speed of the main reels 3 and being provided in a manner so as to be operable by the player; and a sub reel 3S, on the periphery of which are arranged a plurality of symbols for producing effects, in which the rotation speed modification switch 101 becomes operable when a particular effect is displayed by the symbol of the sub reel 3S that is stopped/displayed.