A connector includes a housing fittable with a fitted portion of a counterpart housing of a counterpart connector. The housing includes a base and a fitting portion. The fitting portion is integrated with the base and fittable with the fitted portion. The fitting portion extends in a direction intersecting a fitting direction with respect to the counterpart housing and faces the base. The fitting portion includes a wall configured to close an opening of the fitted portion when the fitting portion is fitted with the fitted portion.