To prevent the occurrence of unevenness in and violent movement of a harness and to smoothly progress a fixing work for the harness, in the fixing structure of the harness disposed on the surface of an insulator dash.

In the fixing structure of a harness that a harness clip 40 fixed at a harness 30 disposed on the surface of an insulator dash is securely inserted in the stud bolt 11 of a dash panel 10, by arranging the installation spot of the harness clip 40 in the recessed part surface of an insulator dash surface and the corner part of the harness 30, violent movement of the harness 30 is prevented from occurring. Further, by providing a wave-from stretch part 44, serving as the harness clip 40, with stretchability, even wen violent movement and unevenness occur to the harness 30, by utilizing stretchability of the harness clip 40, the mounting piece 43 of the harness clip 40 is simply and securely inserted in a stud bolt 11.