WIRE HARNESS FIXING STRUCTURE

A wire harness fixing structure includes; a silencer disposed between a floor mat and a body in a vehicle; a wire harness disposed along a main surface of the silencer; and a fixing member fixing the wire harness to the silencer. A bottomed hole having a bottom is formed in the silencer to be concaved from the main surface in a thickness direction. The fixing member is locked to the bottomed hole, thereby fixing the wire harness to the silencer.