A wire harness includes a plurality of coated electric wires; a connector terminal including a connection portion, a first
barrel portion, and a second
barrel portion; a connector configured to lock and store the connection portion; a rubber seal including a small-
diameter tubular portion, a middle tubular portion having a spiral contour, and a large-
diameter tubular portion, where the small-
diameter tubular portion is secured by the second
barrel portion along with an end portion of the insulation
coating material. The middle tubular portion and the large-diameter tubular portion are force-fitted into a terminal
insertion hole, and a rear holder is secured to the connector with the rubber seal pressed toward the terminal
insertion hole, compressing the middle tubular portion axially. A
waterproofing agent is applied to an outer surface of the middle tubular portion and is cured filling gaps between the middle tubular portion and the terminal
insertion hole.