A small-sized value medium processing device discriminates the genuine/false status of coins, and reads or write processes an electric information recording medium. The value medium processing device allows a coin slotted into a slot to roll along a coin path for discriminating the coin genuine/false status wherein the coin in the coin path can be cancelled by a canceling device. Slots for a coin and for an electric value recording medium are at least partly common with each other. A detecting device for the electric value recording medium is provided in the electric value medium slot. A deactivating device deactivates the canceling device based on detection by the detecting device.