To inexpensively provide a coin processor capable of preventing a mischief by returning inserted coins as they are when returning procedure is performed right afte throwing a coin simple in structure and high in reliability.

In order to solve the problem, the coins, which are to be returned by return operation as they are, are limited to one kind, 500-yen coin, further, the number of coins capable of being held is limited to two coins, and the coin holding mechanism of a holding part 15 is operated by making a pine 16a enter/leave a passage. With such a simple method, the device is simplified by simplifying a holding structure, and costs can be reduced. Further, by locating a coin passing sensor 25 for detecting a coin canceled in holding is passed through the passage located on the downstream side of the holding part 15, coin clogging or the like is speedily detected and reliability can be improved.