A wire harness grommet is provided. The wire harness grommet includes a main body including a first body, a second body connected to the first body, and an inner wall located between the first body and the second body, an inner tube disposed in a center of the main body wherein the inner tube is configured to receive a wire harness, and a plurality of sound insulation projections on the main body, wherein each sound insulation projection has a tapered reflective surface.