A wire harness includes a plurality of covered electrical wires where an insulation sheath is peeled off of each covered electrical wire to expose a lead wire end portion, a connection terminal fixed to an end portion of the covered electrical wire, a heat-shrinkable tube having a hot-melt adhesive laminated to an inner surface thereof covering a predetermined area in a heat-shrunk state, and a connector that irremovably houses the connection terminal in each terminal insertion hole. A connection-side end surface of the connector that is on a side where the connection terminal is connected is positioned so as to conform to an end of the heat shrunk heat-shrinkable tube near a first barrel portion. The connector has a holding tube portion extending integrally from the connection-side end surface and that covers the heat shrunk heat-shrinkable tube, the holding tube portion having a tubular hole that holds the heat-shrinkable tube.