A connector includes an insulating housing that is fixed to a casing of a first device at a communication part through which an opening of the casing of the first device and as opening of a casing of a second device communicate with each other, a conductor unit including a plurality of conductors arranged in a row and an insulating holding body integrally molded with the conductors, and a sealing member that seals between the conductor unit and the housing. Each of the conductors includes a plate-shaped body. The holding body includes a fitting part fitted to the housing, a plurality of covering parts each extending from the fitting part along the body and individually surrounding the body, and a connecting part connecting the adjacent covering parts at a position separated from the fitting part.