To provide a device, a method, and a system for memory medium processing, by which cards can be stored, reissued, and recovered, and a game management method.

When frequency balance is zero at the press of a return button 3d, a conveyor belt 214 is restarted to convey a non-membership ID card 31 to a position opposite a card retaining part 204. The non-membership ID card 31 is retained in the card retaining part 204. When the limit sensing part 231 of the card retaining part 204 senses that the amount of non-membership IC cards 31 retained has reached a permissible amount of retention, the non-membership ID card 31 is dropped into a card discharge part 217 and collected into a card collecting part.