A gaming machine is configured so as to have a function of allowing a bet raise operation to be input by a simple operation in a case where a player bets different bet amounts on a plurality of bet regions within a bet time that is time limited.In particular, if a double bet button 81 having been touched by a player is detected, all of the bet amounts stored in memory are changed with one operation by a predetermined multiple, so that players, who decide immediately before the bet time end that they would like to raise, can raise with one operation.