A grommet comprising: a grommet body having an electric wire insertion hole through which an electric wire is inserted in the axial direction, the electric wire being drawn out from both end faces in the axial direction, the grommet body being configured to be inserted in a mounting hole of a mounting body, the mounting hole comprising a stepped section in an axial middle portion thereof; a sealing section disposed on one end of the electric wire insertion hole of the grommet body in the axial direction, and having an inner circumferential lip formed on an inner circumferential face of the electric wire insertion hole, the inner circumferential lip elastically adhering to the electric wire; and a non-sealing section disposed on another end of the electric wire insertion hole of the grommet body in the axial direction and having no inner circumferential lip on the inner circumferential face of the electric wire insertion hole, the electric wire insertion hole in the non-sealing section having an inside diameter dimension larger than an inside diameter dimension of the inner circumferential lip in the sealing section, the electric wire being inserted in the electric wire insertion hole in a loosely fitted state, a formation range of the non-sealing section being defined such that the linearity of the electric wire in the sealing section is retained when the electric wire drawn out from the other end face of the grommet body is bent, characterized in that: said grommet body includes a sealing zone at one end thereof in the axial direction and a non-sealing zone at the other end thereof, each having an outer circumferential face, wherein said grommet further comprises a radial step interposed between the outer circumferential face of the sealing zone and that of the non-sealing zone, the sealing zone being radially larger than the non-sealing zone; wherein the radial step is abutted against the stepped section of the mounting hole and substantially the entire grommet body is accommodated therein in a positioned state. a grommet body having an electric wire insertion hole through which an electric wire is inserted in the axial direction, the electric wire being drawn out from both end faces in the axial direction, the grommet body being configured to be inserted in a mounting hole of a mounting body, the mounting hole comprising a stepped section in an axial middle portion thereof; a sealing section disposed on one end of the electric wire insertion hole of the grommet body in the axial direction, and having an inner circumferential lip formed on an inner circumferential face of the electric wire insertion hole, the inner circumferential lip elastically adhering to the electric wire; and a non-sealing section disposed on another end of the electric wire insertion hole of the grommet body in the axial direction and having no inner circumferential lip on the inner circumferential face of the electric wire insertion hole, the electric wire insertion hole in the non-sealing section having an inside diameter dimension larger than an inside diameter dimension of the inner circumferential lip in the sealing section, the electric wire being inserted in the electric wire insertion hole in a loosely fitted state, a formation range of the non-sealing section being defined such that the linearity of the electric wire in the sealing section is retained when the electric wire drawn out from the other end face of the grommet body is bent, characterized in that: said grommet body includes a sealing zone at one end thereof in the axial direction and a non-sealing zone at the other end thereof, each having an outer circumferential face, said grommet body includes a sealing zone at one end thereof in the axial direction and a non-sealing zone at the other end thereof, each having an outer circumferential face, wherein said grommet further comprises a radial step interposed between the outer circumferential face of the sealing zone and that of the non-sealing zone, the sealing zone being radially larger than the non-sealing zone; wherein the radial step is abutted against the stepped section of the mounting hole and substantially the entire grommet body is accommodated therein in a positioned state.