To provide a slot machine configured to be shifted to an RT game state based on the stopping and displaying of a specific symbol, wherein excitement and enjoyment of a game are increased by achieving a high game performance in which a player is required to determine whether sift to the RT game state is advantageous to the player or not.

The slot machine 1 includes: an RT game state-generating unit 451 for generating the RT game state according to the stopping and displaying of a specific symbol representing non-alignment of winning symbols; an RT game state-terminating unit 452 for terminating the RT game state according to the stopping and displaying of a symbol representing downfall to a lower prize game; a notification unit 71 for performing notification of evasion information about the symbol representing downfall to a lower prize game; and a notification determining unit 48 for determining whether the notification operation is permitted or not, by lottery. An expected value about the number of game mediums paid out to the player in the RT game state without the notification operation is set smaller than the number of game mediums paid out by alignment of a specific winning symbol combination; and further an expected value about the number of game mediums paid out to the player in the RT game state with the notification operation is set larger than the number of game mediums paid out by alignment of the specific winning symbol combination.