To provide a transaction terminal device for performs a transaction that can return a transacting medium to a customer as soon as possible when a salesclerk receives the transacting medium from the customer.

This transaction terminal device for performing a transaction with the customer is provided with an input device for inputting a customer signature, and an inputted signature is displayed on a displaying part. Thus, the salesclerk receives the transacting medium (credit card, etc.), from the customer to read card information, and the customer subsequently writes his/her signature on the displaying part. The salesclerk can collate the signatures at once and can return the transacting medium to the customer soon after the collation so that uneasiness that the salesclerk takes charge of the customer's transacting medium over a relatively long time can be eliminated.