To provide a game machine capable of easily and/or accurately adjusting a ball discharge rate or reducing the difference of the ball discharge rate by the technique of a player.

In the game machine, the game processing of contents of leading a hand to a winning state is executed by updating the hand having a prescribed number of tiles by deleting a discarded tile and adding a picked tile, and special game means for executing a special game advantageous to a player when a special combination of tiles is established by the hand in the winning state. Special combination of tiles selection means is configured to adjust the probability of selecting a specified winning combination of tiles among two or more kinds of winning combination of tiles as a special combination of tiles on the basis of setting in setting means or is configured to select a winning combination of tiles corresponding to a setting value set in the setting means as the special combination of tiles.