The industrial robot has cables routed, through cable-passing holes (4a, 4b) formed in a side of an arm, between the outside and the inside of the arm. The cables contain mold guide (7) disposed inside cable-passing holes (4a, 4b); cable bundle (6) that passes through the inside of mold guide (7); and filler resin (8) applied to the inside of mold guide (7). The inside of mold guide (7) is filled with filler resin (8), so that cable bundle (6) is held in place.