To display a plurality of symbols in a plurality of display regions, upon starting a game, and in a case where trigger symbols are stop displayed in any of the plurality of display regions, to draw for specific display regions where trigger symbols are displayed, from a plurality of types of symbols so that the symbols are displayed having a predetermined relationship among the symbols in at least game units, and at the same time, to draw for general display regions that have symbols other than the trigger symbol displayed, from a plurality of types of symbols so that arbitrary symbols are independently displayed.