Abstract: A waterproof connector (10) includes an annular rubber ring (30) and a housing (20) on which the rubber ring (30) is to be mounted. A trapezoidal rotation stopping rib (34 having two engaging surfaces is provided on a side edge of the rubber ring (30), whereas an accommodation groove (26) into which the rotation stopping rib is to be accommodated is provided in the housing (20). The accommodation groove (26) has a bottom surface (21A). Two facing engaged surfaces (42) are on both sides of the bottom surface (21A) and are configured to press the rotation stopping rib to the bottom surface (21A) by being engaged with the engaging surfaces of the rotation stopping rib.

Abstract: A waterproof connector (10) disclosed by this specification includes an annular rubber ring (30) and a housing (20) on which the rubber ring (30) is to be mounted. A rotation stopping rib (trapezoidal rib (34)) having a pair of engaging surfaces is provided on a side edge of the rubber ring (30), whereas an accommodation groove (26) into which the rotation stopping rib is to be accommodated is provided in the housing (20). The accommodation groove (26) is composed of a bottom surface (21A) and a pair of engaged surfaces (facing surfaces (42)) provided on both sides of the bottom surface (21A) and configured to press the rotation stopping rib to the bottom surface (21A) by being engaged with the engaging surfaces of the rotation stopping rib.