To prevent an entry of foreign matter such as gravel into an insertion hole of a grommet for particularly inserting a pin, in a clip.

This clip includes the pin 40, and the grommet 50 having the insertion hole capable of inserting the pin 40 and forming a plurality of leg pieces 92 by a slit 91 arranged in the length direction of a leg part 90. In the clip 10, a part of the grommet 50 can be expansively opened by inserting the pin 40 to the insertion hole. A preventive part 110 for preventing the entrance of the foreign matter such as the gravel is arranged in at least one of the pin 40 or the grommet 50 (for example, the pin 40). The preventive part 110 is positioned in a part of an insertion leg 60 of the pin 40, or is positioned in a part of a leg piece 92 of the grommet 50, or may be extended along the length direction of the slit from an under surface of a flange of the grommet.