To provide a novel game machine allowing players to play predicting the number of possible wins to a large winning device opened first.

A main circuit 101 (a lottery means, a game control means, a winning counting means and a number-of-wins determination means) of this Pachinko game machine 1 opens a first large winning device 22 in a start in each round game in a big win game, when a second time after the number of wins reaches a first winning number elapses 10 seconds (measured by a second timer 101f (a second time-counting means)), a first time from starting the round game elapses 30 seconds (measured by a first timer 101e (a first time-counting means)) or the number of wins reaches 10 (a second winning number), closes the first large winning device 22, if the first time non-elapses 30 seconds at the closing time and the number of wins non-reaches 10, opens a second large winning device 23 and, when the first time elapses 30 seconds after the opening or the number of wins reaches 10, closes the second large winning device 23.