A transmission terminal connected in communication with another transmission terminal via a network, the transmission terminal comprising: a reception part adapted to externally receive data to be displayed for being displayed on a display part connected with the transmission terminal; a terminal information acquisition part adapted to acquire terminal information of the other transmission terminal which is adapted to transmit the data to be displayed, received by the reception part, from an information storage area previously associated with the other transmission terminal; and an image display control part adapted to display the data to be displayed, received by the reception part, and the terminal information acquired by the terminal information acquisition part in a manner associating them with one another on the display part in a manner depending on a type of the data to be displayed, received by the reception part, characterized in that the image display control part is adapted to display the data to be displayed, received by the reception part, and the terminal information acquired by the terminal information acquisition part in a manner of associating them with one another on the display part when the data to be displayed, received by the reception part, has a predetermined type and is displayed in a predetermined layout, wherein the image display control part is adapted to display the data to be displayed, received by the reception part, in a manner of not associating it with the terminal information acquired by the terminal information acquisition part when the data to be displayed, received by the reception part, has the predetermined type and one set only is displayed, and the image display control part is adapted to display the data to be displayed of a predetermined type and the terminal information acquired by the terminal information acquisition part in a manner associating them with one another on the display part when the data to be displayed, received by the reception part, has the predetermined type but the data to be displayed, received by the reception part, is displayed together with data to be displayed of a type other than the predetermined type. a reception part adapted to externally receive data to be displayed for being displayed on a display part connected with the transmission terminal; a terminal information acquisition part adapted to acquire terminal information of the other transmission terminal which is adapted to transmit the data to be displayed, received by the reception part, from an information storage area previously associated with the other transmission terminal; and an image display control part adapted to display the data to be displayed, received by the reception part, and the terminal information acquired by the terminal information acquisition part in a manner associating them with one another on the display part in a manner depending on a type of the data to be displayed, received by the reception part, characterized in that the image display control part is adapted to display the data to be displayed, received by the reception part, and the terminal information acquired by the terminal information acquisition part in a manner of associating them with one another on the display part when the data to be displayed, received by the reception part, has a predetermined type and is displayed in a predetermined layout, wherein the image display control part is adapted to display the data to be displayed, received by the reception part, in a manner of not associating it with the terminal information acquired by the terminal information acquisition part when the data to be displayed, received by the reception part, has the predetermined type and one set only is displayed, and the image display control part is adapted to display the data to be displayed of a predetermined type and the terminal information acquired by the terminal information acquisition part in a manner associating them with one another on the display part when the data to be displayed, received by the reception part, has the predetermined type but the data to be displayed, received by the reception part, is displayed together with data to be displayed of a type other than the predetermined type.