Connector

A connector (10) according to one embodiment of the present disclosure is provided with: a housing (20) having an opening (23) and a facing surface (24a) provided on the periphery of the opening (23) and facing the outer surface of a housing; a terminal (30) exposed from the opening (23); a plate (50) that protrudes from the housing (20) toward the outer peripheral side of the opening (23) and is attached to the case; and a seal member (60) provided on the facing surface (24a), the seal member (60) having an annular seal body (61) that surrounds the periphery of the opening (23) and seals the space between the case (20) and the housing. The plate (50) has a through hole (52) penetrating in the thickness direction of the plate (50). The seal member (60) has: an extension section (62) that extends from the seal main body section (61) toward the plate (50) and is inserted into the through-hole (52); and a retaining part (65) which is provided on the extension part (62) and which, by engaging with the plate (50),