A card processor of the present invention has: an insertion slot, into which a card is inserted; a carriage path, along which the card inserted from the insertion slot is carried; a stock portion, which is installed on a downstream side of the carriage path and capable of housing inserted cards in a stacked state; and a housing drive mechanism, which houses a card into the stock portion, wherein the housing drive mechanism includes an oscillating member having a first projecting/withdrawing portion which is located on the insertion slot side and capable of projecting and withdrawing from the carriage path and a second projecting/withdrawing portion which is located on the stock portion side and capable of projecting and withdrawing from the carriage path, the oscillating member being oscillatably supported via a shaft, and the second projecting/withdrawing portion of the oscillating member presses up the cards housed in the stock portion when the card inserted from the insertion slot presses down the first projecting/withdrawing portion of the oscillating member.