A thermal transfer device including a transfer roller and transporting portions that are spaced apart from and oppose each other; a heating member for heating surface of the transfer roller; a tray for placing thereon a member, being an optical recording-medium, to be subjected to transfer; and a transfer sheet with a transferring portion formed by printing, wherein the tray carrying the transfer sheet and the member to be subjected to transfer Such that the transferring portion faces the member is transported between the transfer roller and the transporting portions with the transfer sheet in contact with the transfer roller, whereby the transferring portion of the transfer sheet is thermally transferred onto the member. The thermal transfer device is capable of providing good quality printing at all times as a result of forming the transferring portion of the transfer sheet by printing, followed by thermal transfer of the transferring portion onto the member being an optical recording medium.