A clip includes a grommet having a projecting portion and a plurality of leg portions extending from the projecting portion, and a shaft member including a head portion, and a shaft portion extending from the head portion, and inserted into an inside of the leg portions to laterally expand the leg portions. The clip is switchable between a lock position to expand the leg portions laterally, and an unlock position where the shaft member is further pushed to return the leg portions to an original condition. Each leg portion includes a leg-side convex portion, a convex-portion wall face, and a guide portion. The shaft portion includes a shaft-side convex portion engaging the leg-side convex portion, a concave portion provided between the shaft-side convex portion and the head portion, and engaging the leg-side convex portion to return the leg portion to the original condition, an abutment portion, and a release portion.