A touch panel is configured so that a lower glass substrate with a very low thermal expansion coefficient, as its lower substrate, projects outwardly from outer edges of an upper film substrate. Since a front design sheet is secured to the lower glass substrate, a housing, which is a molded article, need not be provided with any area for the fixation of the front design sheet. Thus, the distance from the contour of a display unit to a display area can be reduced, so that the display unit can be reduced in size.