PURPOSE: To enlarge a space through which hit balls flow down by arranging a predetermined number of chuckers among plural ones in such a manner as being oriented downwardly stepwise toward the center of width on the right and left sides of a playing portion.

CONSTITUTION: A chucker 70 is disposed above the center of a playing portion 40 and chuckers 71, 72 are disposed on both of the right and left outsides of a portion diagonally beneath the chucker 70. Chuckers 73-78 are disposed by three each on both of the right and left outsides of a portion diagonally beneath the chuckers 71, 72. The chuckers 73-78 are disposed at approximately the center of the height of the playing portion 40 with the largest chuckers 73, 78 disposed along a guide rail 30, and the chuckers 74-77 are disposed downwardly stepwise toward the innermost chuckers 75, 76. Chuckers 79-96 are lowered by one step from the chuckers 75, 76 and are arranged in a row beneath the playing portion 40. A space through which hit balls flow down can thus be secured.