PURPOSE: To provide a part fitting structure which improves the appearance quality of the clip fitting portion and allows easy attachment/detachment of a clip.

CONSTITUTION: The claviform fitting portion 2 which is integrally protruded from the side face of a clip body 1a is fitted to a wide-corner fitting groove 4b which is made in the side wall 4a extended at a nearly right angle to one parts 4. The clip portion 3 which has plural locking pieces 3b integrally protruded from the lower face of the clip body 1a is locked to the locking hole 5a which is made in the other parts 5.