A waterproof type electronic apparatus of the present invention includes a key sheet at which a plurality of operation keys are formed, a front panel having its front face fixedly bonded to the circumferential portion of the key sheet, and a pushing element sheet interposed between the front panel and the switch sheet. The front panel is provided with a plurality of openings corresponding to ones of the operation keys. At the pushing element sheet, a plurality of pushing elements is formed. A waterproof packing extends passing through the position at which it overlaps with the opposite side portions of the circumferential portion of the key sheet.