Cable holding structure of the robot rotation axis

An apparatus holds plural cables arranged in a robot. A first fixing member secures ones of both ends of the cables on a first shaft portion in a flat form, the ones of the end portions being directed in a rotation direction of the second shaft portion. A second fixing member secures the others of both end portions of the cables on a second shaft portion in the flat form, the other end portions being directed in the rotation direction. The remaining portions of the cables are bent and suspended along the first and second shaft portions in a U-shaped and flat form when being viewed in the rotation direction. A first cable guide, fixed to the first shaft portion, accommodates part of the cables therein in the plat form. A second cable guide, fixed to the second shaft portion, accommodates part of the cables therein in the flat form.