To provide a Pachinko game machine for preventing the decrease of balls during a variation time shortening game without increasing an opportunity for big win lottery.

The Pachinko game machine includes: a first start port 18; a second start port 19 including a variable prize winning device; and two special symbol display devices 61, 62 corresponding to the respective start ports 18, 19. When a probability for stopping a small win pattern in the first special pattern display device 61 is defined as S1, the average opening time of a large winning port in the small win game to be performed after the small win pattern stop is defined as T1, a probability for stopping the small win pattern in the second special pattern display device 63 is defined as S2, and the average opening time of the large winning port in the small win game to be performed after the small win pattern stop is defined as T2, S1T1S2T2 is satisfied.