PURPOSE:To prevent contact of rainwater and moisture from the outside, with an electronic unit by forming an airtight chamber independent of the airtight chamber in the electronic unit side through closing airtightly a front aperture portion of a camera case by means of glass, and closing a back side of the camera case by means of a substrate, and arranging the electronic unit inside the back side chamber, and attaching a cable cover on the substrate and a plane cover of the camera case for holding an end of a cable having a cable side connecting plug. CONSTITUTION:Firstly, a front rubber packing 15 is put inside an aperture of a camera case 14 for fixing glass 16. Next, a substrate 19 is fitted into the camera case 14, and sealing liquid 25 is painted around a connecting plug 26 on a back surface of the substrate 19. Furthermore, a cover 22 is attached to a back surface of the cover case 14, and then a connecting plug 29 is fitted to the connecting plug 26. Then, a cover 30 is clamped by means of screws. As a result, the camera case 14 has an airtight duplex structure in which the chamber inside the camera case 14 is devided airtightly into a part, in which an electronic unit 18 is attached, and another part, in which connecting plugs 26 and 29 are attached. Thus, penetration of rainwater and moisture from the outside is prevented almost sufficiently.
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