The present invention provides a cable processor capable of supplying cables to a plurality of hands attached to a forward end portion of an arm without increasing the size of a joint portion of a robot and further without causing a problem of the breaking of wire at the time of operating the robot. There is provided a cable processor of a robot for accommodating a cable such as an air pipe or electric wire inside an arm of the robot, and the cable processor comprises: a casing portion (20) for accommodating the cable (21), arranged in a joint drive portion of the robot, wherein the casing portion (21) is provided with rollers (23), which are arranged on an inner wall of the casing portion (21), rotating round a drive shaft of the joint portion.