GROMMET AND GROMMET ATTACHMENT STRUCTURE

A grommet includes: a pair of clamping bodies that clamp a wire harness; a hinge portion that openably and closably couples the pair of clamping bodies; and an engagement portion that is provided at the pair of clamping bodies and that engages with an attachment hole formed in an attachment panel in a state in which the wire harness and the hinge portion clamped by the pair of clamping bodies are inserted into the attachment hole.