The present invention provides a hard-to-fall fixing structure of wire harness contributive to cost reduction in which VOC is not generated and flapping sound (noise) of wire harness is hard to occur. In the fixing structure of a wire harness to a vehicle interior material according to the present invention, a silencer pad (acoustical material) is fixed to the vehicle interior material, and the silencer pad is provided with a latching piece formed by cutting a portion of the present silencer pad, and the wire harness is latched to the latching piece.