To stabilize cargoes to be transported.

This cargo bar has reduced cost because it is partially formed of a rectangular pipe and partially contractable to a length enough to fit a 4 foot pallet for facilitating transportation and storage. The extension of the cargo bar due to pressure applied to abut on the opposite wall of a truck is allowed by a rack and pinion gear structure, rack teeth 38 provided on a first pipe and pinion teeth 40 provided on a pivotal lever 34 mounted on a second pipe. The end of the bar is provided with a pressure pad 14 corresponding to the side wall of the truck or a van and the pipe is fitted at its inside alternately to retractable track pins to be retracted behind the pad so that it extends through the pad and stores various cargo bar devices.