A harness protecting structure is provided for a vehicular horn for a vehicle, in which the vehicle has a grille defining an air intake opening in a front part of the vehicle, a radiator located posterior to the grille, and the horn being disposed in front of the radiator and facing the opening of the grille. The grille is provided with a peripheral wall, the peripheral wall extending posterior to the lower and side edge of the grill, and a part of the peripheral wall extending across and anterior to a peripheral region of the horn so as to form a protective surface. The harness of the horn is laid from the outside of the region of the horn behind the protective surface.