To highly maintain interest of a game player in contens of notice, and promote feel of expectation of winning a prize.

For giving notice of winning probability to a bonus prize in a slot machine, plural notice patterns are set for executing a specified number of times of notice while changing modes of the notice, and plural notice timing patterns are set to indicate combination of execution timings of notice each time. In giving notice, one pattern is selected from each of the plural notice patterns and the plural notice timing patterns. Notice each time based on the selected notice pattern is executed at the timing based on the selected notice timing pattern, so the timing of notice of even the same notice pattern is different in accordance with the notice timing patterns.