A grommet in which sealing performance is enhanced by preventing that portion of the grommet provided with a recess for latching onto the body from being deformed even if a wire harness being passed through the grommet is bent suddenly. The grommet comprises an inner tube for penetrating the wires of a wire harness tightly as a group, an annular coupling portion projecting from the outer circumferential surface of the inner tube, and an outer tube continuous to the outer circumferential end of the annular coupling portion and concentric with the inner tube, characterized in that the outer tube makes a thick portion continuous to the annular coupling portion, makes an inclining wall having a reducing diameter continuous to the thick portion, and provides an annular recess, for latching onto the body, in the outer circumferential surface at the boundary of the thick portion and the inclining wall, and the annular coupling portion is made thin and bent into a V-shape that extends from the inner circumferential end being coupled to the outer circumference of the small-diameter inner tube to the outer circumferential end being coupled to the inner circumference of the outer tube.