A paper-money receipt/payment machine comprises a conveyance path, on which paper sheet can be conveyed in dual directions, and a paper-money discrimination unit provided midway the conveyance path to discriminate the paper sheet. The machine further comprises a temporary holding unit for storage of rejected paper sheet to be rejected, and an exclusive storage box, separately provided from the temporary holding unit, for storage of jammed paper sheet. The exclusive storage box is arranged at one end or both ends of the conveyance path.