In a resistive-film type touch panel having two resistive-film sheet, a first resistive-film sheet has a power supply means connected to it which generates in it a voltage gradient and the second resistive-film sheet detects a voltage which corresponds to a pressed position on the touch panel. Voltage information corresponding to pressed position coordinate values detected from the two resistive-film sheet is transferred to an A-D conversion means via a switching means for determination of the pressed position on the panel. A non-display region of the panel is provided with function keys, and the panel is additionally provided with a notification means and a non-display region pressing detection means, the notification means making notification of the output from the non-display region pressing detection means, which indicates that the non-display region has been pressed, without intervention of the analog-digital conversion means, directly to a processing/control circuit.