In the slot machine 1, when the payout correspondence table 33a of the RAM 33 is changed to the special payout correspondence table 33b, the special payout information 4C, 4D on the basis of the special payout correspondence table 33b is displayed on the sub-display 4, instead of the payout information 4A, 4B on the basis of payout correspondence table 33a. Therefore, till the special payout information 4C, 4D is displayed on the sub-display 4, the player cannot confirm the special payout information 4C, 4D, thus the player cannot predict the payout. As a result, for the player, unexpected feeling of the payout can be raised and interest for games can be improved.