PURPOSE:To prevent rattle of a male and a female water-proof connector housings, which comprise a fixing cylinder to a sealing ring respectively, at the time of fitting to each other. CONSTITUTION:In a female connector housing A2, a male connector housing B1, a sealing ring C, a fixing cylinder D2, a supporting projection 16 is provided in the bottom wall 6 of an outer casing body 1, and a notch part 17 for receiving the supporting projection 16 is formed in the bottom wall 10 of the fixing tool D2. In this case, since the height (p) of the supporting projection 16 is larger than the thickness (q) of the bottom wall 10, the supporting projection 16, which is positioned inside of the notch part 17 when the fixing cylinder D2 is installed into the outer casing body 1, is projected from the bottom wall 10, and the male connector housing B1 is supported by the supporting projection 16 directly to prevent rattle of the connector housings.
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