To improve grinding efficiency for long term use by spreading a pair of grinding bands in the shape of endless belts into the state of being vertically extended while being confronted so as to be proximate each other, and providing plural slit holes for passing dirt removed from playing media on one of respective grinding belts.

In this grinding and upward feeding device, which is erected inside a game machine island equipped with a series of plural game machines, for feeding playing media, ejected from the respective game machines and stored in the lower step of island, upward to the upper step of island while grinding them, a pair of grinding belts 30 in the shape of endless belts are spread into the state of being vertically extended while being confronted so as to be proximate each other, and plural slit holes 31 for passing the dirt removed from the playing media are provided at least on one respective grinding belts 30. Then, the slit holes 31 on the grinding belt 30 are provided so that plural holes can be parallelly arranged in the breadthwise direction of grinding belt 30 and plural holes can be perallelly arranged in the lengthwise direction as well. Further, the slit holes 31 of the grinding belt 30 are provided in the shape of mesh. Besides, a soft elastic body composed of porous materials is overlapped at least on the rear side of one of grinding belts 30.