To provide an improved cable guide for an articulated joint of a robot or the like that allows a compact design of the articulated joint while minimizing the length of the cable, a substantially circular outer peripheral wall (16) of a hollow center drum (13) fixedly attached to the first link member is formed with a hole (28) at a first angular position substantially aligning with the first link and a slot (17) formed at a second angular position and elongated circumferentially over an angle substantially corresponding to a range of angular movement of the second link member relative to the first link member in such a manner that the cable member is passed into the center drum from the hole and out of the center drum from the slot. Thereby, the cable member can pass through the interior of the articulated joint along the shortest path, and the necessary length of the cable can be minimized.