GROMMET AND WIRE HARNESS

The objective of the present invention is to provide a technology capable of suppressing torsional deformation in an attachment portion, even if a torsional moment is applied from an electric cable to a grommet. This grommet is provided with a tubular main body portion through which an electric cable is inserted, and an attachment portion used for attachment to an attachment target. The main body portion includes a holding portion used to hold the electric cable, and a linking portion joining the holding portion and the attachment portion. A recessed/protruding portion in which protruding portions and recessed portions are arranged alternately in a circumferential direction about an axis parallel to the insertion direction of the electric cable is provided in the linking portion.