A connector in which a housing and a retainer are coupled with sufficient strength when the connector is reduced in scale. In this connector, provisional anchoring pieces and main anchoring pieces are provided at two end portions of an inner peripheral wall of an insertion hole formed in the housing, with lengths along a direction that intersects a direction of insertion of the retainer into the insertion hole. At outer sides of two end portions of the retainer, anchorage pawls, which are formed to be engageable with the main anchoring pieces and the provisional anchoring pieces, are provided with lengths along the intersecting direction. With this structure, when the retainer is inserted into the insertion hole of the housing, the anchorage pawls engage, at two end portions of the connector, with the provisional anchoring pieces and with the main anchoring pieces.