A linear object handling structure of a robot that includes a base to be fixed to an installed surface, and a rotary barrel supported to be rotatable around a vertical rotary axis with respect to the base, and is provided with, in a region including the rotary axis, a through hole vertically penetrating through a top board of the base, and a hollow portion having a cylindrical inner surface extending inside the rotary barrel from the through hole along the rotary axis. A mechanism unit cable of the robot passes from an inside of the base to an upper part of the rotary barrel through the through hole and the hollow portion, and is fixed in the inside of the base and at the upper part of the rotary barrel while the mechanism unit cable is bent inside the hollow portion and is pressed against the inner surface.