A clip and a wire harness equipped with a clip are provided that can restrain the clip from readily falling down from an electrical wire bundle, can be easily mounted on the bundle, and can reduce a protruding amount of the clip from the bundle to as small as possible. A clip includes an inserting section to be inserted into an attaching hole in a vehicle body, and a holding section for holding an electrical wire bundle. The holding section includes a projection portion that protrudes from the inserting section, and distal end spreading portions that spread from a distal end of the projection portion toward spaces at opposite sides of the projection portion. The distal end spreading portions are curved in convex shapes in a distal end direction of the projection portion as a whole.