To provide a coin processor capable of performing appropriate processing according to the presence of an escrow coin when power is turned on.

An escrow sensor 6 for detecting the presence of an escrow coin is provided in an escrow section 5 of the coin processor 1. Moreover, the escrow section 5 comprises an escrow release mechanism, and operates in conjunction with the escrow sensor 6 based on a coin storage instruction or the like from the side of a vending machine. When it is determined by an empty sensor 7a to 7d that no change coin corresponding to a denomination of escrow coin is stored in each change coin tube 3a to 3d, the escrow coins M1 to M4 are guided to the change coin tube 3a to 3d, so that the change coins may be returned upon a coin return instruction by the vending machine side afterwards.