To obviate installation of collection parts separately for collecting coins which are forgotten to be taken and payment rejected coins, by obviating an identification part which identifies whether or not the payment coins are in the number and denominations instructed by a host device.

This coin payment transaction device is constituted so as to count, compare the number of passing coins to judge whether or not a payment operation is normal by providing a delivery part sensor and a payment part sensor. Otherwise, a coin payable number counter is further provided, the number of excess delivery is subtracted from coin payable number counters of denominations to be payment, respectively and the coin payable number counters are used as coin number management counters in transactions afterward. Otherwise, the coin payment transaction device is further equipped with a payment rejection storage which stores the payment rejected coins and the coins which are forgotten to be taken and when there is not coin in the payment rejection storage, collects the coins which are forgotten to be taken in a payment tray in the payment rejection storage to continue payment transactions.