Abstract: Deposited coins are stored in a coin storing device and change is paid out of coins storred in this storing device. For detecting an amount of coins going in and out of the coin storing device, a going-in-and-out detector is provided. For setting an initial amount P of stored coins in the coin storing device, an initial stored coin amount setter is provided. In an operation device, an operation for obtaining difference N between a current amount S of stored coins and the initial amount P in accordance with the output of the going-in-and-out detector and the initial amount P. When the amount of stored coins in the coin storing device is to coincide with the initial amount P (e.g., when an inventory operation is to be performed), a command device commands this. In response to this command, a payout control device performs, if the current amount S is larger than the initial amount P, control for paying out the number of coins corresponding to the difference N.