<p>A liquid-proof connector includes a connector housing including a mating connector fit-in part into which a mating connector is fitted and a terminal accommodation part in which a terminal holder locking a terminal connected to an electric wire is held and that includes a section enlarged area part. The connector housing is filled with a resin. An inner surface of the section enlarged area part has a round shape connecting a portion parallel to an insertion direction along which the terminal is inserted into the connector housing and a portion perpendicular to the insertion direction so that the cross section of the section enlarged area part is enlarged to a predetermined size.</p>
