GROMMET

A grommet includes: an engagement body; a first cylindrical body; a second cylindrical body; a first partition wall; a second partition wall; a holding part fixed together with a wiring material; and a pair of projection parts projected from an inner wall of the first partition wall. The first cylindrical body and the first partition wall are deformed in a pulling direction of the wiring material in a loaded state. An end part of the projection part is disposed, to be opposed to an inner peripheral surface on an inner side in the radial direction with respect to a groove bottom of an engagement groove of the engagement body, and acts pressing force on an inner peripheral surface of the engagement body from an end part due to displacement caused by deformation from an inner peripheral part side of the first partition wall in the loaded state.