A clip 200 includes a locking portion 6 and an operation portion 9. The locking portion 6 of the clip 200 is inserted into the clip insertion hole 7 exposed while the protrusion 1a of the panel 1 is fitted into a protrusion insertion hole 5a of a panel attaching portion 5. An upper surface 12b of a locking main body portion 12 of the clip 200 presses an inner surface of the clip insertion hole 7 to bend the protrusion 1a. A rear side inclined surface 19b of a hook portion 13 of the clip 200 presses a front side horizontal edge 21b on a ceiling surface of the clip insertion hole 7, and both connecting portions 14 of the clip 200 press vertical edges 22 of an inner wall surface of the clip insertion hole 7. The clip can easily and reliably fix a vibration generating member.