Abstract: An improved supporting device for wiring of electric cables for an industrial robot is provided which is adapted to house an increased number of electric cables and pipes without making the robot body of a high vertical height or large-sized. The supporting device has plurality of circular spaces divided by axial partition walls each extending along a concentric circle with respect to the rotation axis of the rotary base. A plurality of bundles containing a plurality of electric cables and/or pipe(s) are so installed in each of the circular spaces that each one end of the bundles is secured on the interior wall of the base and then, each bundle extends halfway along a center of one of the circular spaces, and then is turned back to form an U-shaped configuration and returns along a center of opposite circular spaces of the rotary base, and each of the other end of bundles is secured on the rotary base.