A connector has a housing including an insertion portion, a recess-shaped shaft receiving portion opening in an opening direction and an abutment surface facing in an opposite direction from the opening direction, and an operation member held by the housing rotatably around an axis direction of a rotation shaft portion inserted in the shaft receiving portion, the operation member including a lock portion and a projection, as the operation member is brought to a closed position while a connection end portion of a connection target is inserted in the insertion portion, the lock portion is fitted in a lock receiving portion of the connection target to prohibit pull-out of the connection end portion of the connection target from the insertion portion, and the projection comes into contact with the abutment surface to prohibit movement of the operation member in the opening direction.