To provide a mahjong ball game machine capable of acquiring a score even with a small number of remaining balls.

The mahjong ball game machine includes a game start instruction means of issuing instructions to start a game, and a game ball shooting means capable of shooting game balls, namely own balls, one by one. A game control means includes: a self-draw tile control means of adding a tile corresponding to a ball entry port and used as a self-draw tile to a hand tile data temporary storage means as hand tile data, when the game ball shot toward a playfield by the game ball shooting means enters one of ball entry ports; and a game medium put-out control means of putting out the number of game media calculated based on a score set for each winning combination, in completion of the winning combination comprising a plurality of hand tile combinations to which hand tile data are preset. The mahjong ball game machine operates a score increasing device when a game ball enters a predetermined specific ball entry port from among the ball entry ports, and decides put-out of the game media corresponding to an increased score.