Provided is a grommet having: a main body, which is arranged in close contact with an opening of an attachment member, through which a shield electric wire having an electric wire covered with a braid is inserted, and which includes an elastically deformable electrically conductive material; a pair of shield terminals that are arranged respectively on one side and the other side of the attachment member, are connected with end portions of the braid, are assembled with the main body, and include an electrically conductive material; and an insertion portion, which is formed of a member continuous with the main body, through which the electric wire exposed from the braid is inserted, and which comes into close contact with the outer circumference of the electric wire.