A mounting structure includes a protection panel (1) with a touch input function for protecting an electronic device display window, mainly formed of the protection panel body made of a resin plate, and a panel fitting portion (32a) of an exterior housing (32) into which the protection panel (1) is fitted from outside so that an outer face of the protection panel (1) is in the same plane as a portion of the exterior housing surrounding the outer face. In this structure, nut mounting holes are formed in a back side rim portion of the protection panel body and nuts (33) each having a female thread formed in an inner periphery thereof are attached to the respective nut mounting holes, and male screws (34) are screwed into the respective female threads of the nuts (33) through through-holes (32b) formed in the panel fitting portion (32a) of the exterior housing (32).