To provide a game ball distributing structure on a stage for a pachinko machine with maximally enhanced game amusement by varying a flow passage for a game ball.

The stage 1 is formed by arranging distribution bases 4, 5, and 6 having game ball guide passages 7, 8, and 9 arranged on upper faces 4a, 5a, and 6a in the longitudinal direction in stepped form, and the distribution base 6 in the center is reciprocated in the lateral direction with respect to the distribution bases 4 and 5. In this way, the flow passage for the game ball 2 flowing down on the stage 1 can be varied, and the flow passage for the game ball 2 is not decided by its throw-in position on the stage 1, so that player' s expectations for entrance of the game ball 2 into a large prize hole (a starting prize hole) 3 can be maintained and game amusement can be enhanced maximally.