To provide a game machine which is capable of removing, from a game ball passage, dust and liquid that infiltrate from an upper tray into a game ball passage, and which is capable of reducing the size of a ball extraction device.

A game ball passage 21 has a pair of side wall parts 22 that are arranged with a space slightly wider than the diameter of a game ball. In the lower end of the pair of side wall parts 22, there is a rail-shaped member 23 projecting from the inner side face of the side wall part 22 to the opposite side wall part 22. The rail-shaped member 23 supports, at two points, the game balls flowing down in a line in the game ball passage 21. An interval of a pair of rail-shaped members 23 is opened, wherein dust and liquid infiltrating from an upper tray side can be removed by making them fall downward. A ball extraction device 31 makes a part of one rail-shaped member 23 freely retractable from one side wall part 22 as a retractable member 32. While the retractable member 32 is retracted into one side wall part 22, a game ball can be extracted from the ball extraction device 31.