To provide a ball path structure for a pinball game machines which enables the expansion of the degree of the freedom in the setting of the gage by achieving the arrangement of a large image display device and a prize winning device.

A ball put-out device 42 is provided at the upper part of a rear mechanism board 40 while a ball put-out path 46 which makes the game balls put out of the ball put-out device 42 flow down to the ball tray is provided below the ball put-out device and a ball withdrawal path 47 is so arranged as to make the game balls discharged from the ball put-out device 42 flow down toward the ball discharge port from which the game balls are discharged outside the machine behind the front frame. The ball put-out path 46 and the ball withdrawal path 47 are so formed being adjacent to each other as to be superposed longitudinally being separated from the central path wall 44c bent into an S-shape longitudinally.