To prevent a problem that a player gets tired of seeing a display condition displayed by a variable display unit as much as possible, by displaying a varied interesting display condition shown by the variable display device.

The first special pattern 5a, the second special pattern 5b and the third special pattern 5c respectively comprising the combination of plural kinds of numerical values and illustrations, a hero character 5d and a monster character 5e are displayed on a variable display part 5 of a variable display unit. When a reach condition that the first special pattern 5a and the second special pattern 5b become '7', is generated, a fighting scene of the hero character 5d and the monster character 5e is displayed.