To reduce the cost of the whole safe-deposit box control system by a simple structure, and to miniaturize an identification-card control machine.

The conveyor for the identification card is constituted in the identification-card control machine, in which an open-close lock is annexed to a door for a safe-deposit box and the identification card capable of releasing the open-close lock is dispensed and returned. The conveyor consists of an identification-card conveying path 12 functioning as the dispensation and return of the identification card in combination and a stock section 15, which delivers the identification card to the identification-card conveying path 12 and in which a plurality of the identification cards are superposed and stocked, at that time, and the stock section 15 can be reciprocated, and delivers the identification card to the identification-card conveying path 12 from one end side of the stock section 15 at the time of dispensation and receives and stocks the identification card on the other end side of the stock section at the time of return.