An umbilical-member managing structure for a welding torch in an arc welding robot, for laying and managing, along a manipulator, a plurality of umbilical members connected to a welding torch attached to the manipulator. The umbilical members include a welding wire fed to the welding torch, a tubular liner surrounding the welding wire, a tube for supplying an assist gas to the welding torch, and an electrical conductor for feeding a welding current to the welding torch. The arc welding robot is provided with a wire feeding device mounted on the manipulator for feeding the welding wire to the welding torch. The umbilical-member managing structure includes a flexible conduit containing the umbilical members, which includes a first connecting section provided at one longitudinal end connected to the welding torch, and a second connecting section provided at another longitudinal end connected to the wire feeding device; and a connection mechanism provided for at least one of the first and second connecting sections of the conduit, for rotatably connecting the conduit to at least one of the welding torch and the wire feeding device.