To make it easier to confirm a person himself at the time of illegal use of a credit card, merchandise returning or the like at a POS terminal.

This POS terminal is composed of a storage means 2, a monitoring camera 7 installed so that it can photograph a transaction customer, a transaction information recording means 10 for recording information on business transaction in the storage means 2 for every business transaction, and a picture data recording means 11 which photographs the transaction customer by the monitoring camera 7 for every business transaction, relates the picture data to information on the corresponding business transaction and records them in the storage means 2. The transaction customer who performs the transaction is specified by recording the picture of the transaction customer together with each transaction information.