Abstract: A connector comprises a connector housing receiving therein a terminal fitting connected to an electrode of a connector-mounting portion and an electrical wire at an end of which the terminal fitting is provided; a cap for the connector housing; and a packing for the cap. The packing includes a mushroom-like locking projection with an enlarged end portion. The cap includes a locking hole into which the end portion of the locking projection is inserted so that the end portion is placed in locking engagement with the locking hole.