A connector is provided which has terminals able to contact the opposing terminals connected to the terminal ends of electrical wires, and a housing accommodating the mounted terminals. The housing has a terminal accommodating recessed portion in the bottom end portion of the housing. The terminal accommodating recessed portion receives the inserted opposing terminals, and a head portion for sealing the upper end of the terminal accommodating recessed portion. The head portion includes a ceiling panel portion and side panel portions. Each side panel portion includes a water discharging hole communicating with the interior of the terminal accommodating recessed portion and outside of the housing, and a waterproofing rib formed around the water discharging hole and protruding from the outer surface of the side panel portion.