GROMMET

A grommet is provided with a small-diameter tubular portion that is fixated to an outer circumferential surface of a wire harness, a large-diameter tubular portion that is fixated to a through-hole of a fixed member, and an increasing-diameter tubular portion that connects the small-diameter tubular portion and the large-diameter tubular portion. The increasing-diameter tubular portion includes a small-diameter tubular portion-side end portion provided isolated from the small-diameter tubular portion on the outer circumference side of the small-diameter tubular portion, and a flexible connecting portion connecting an inner circumferential surface of the increasing-diameter tubular portion to the small-diameter tubular portion. A plurality of contact ribs are provided projecting from an outer circumferential surface of the increasing-diameter tubular portion, the contact ribs being arranged so as to be separated from each other in a circumference direction, each extending from the large-diameter tubular portion side toward the small-diameter tubular portion-side end portion.