Abstract: An expandable rack for a truck bed used to transport lumber and the like is provided by a plurality of folding legs rigidly connected to an upper frame that supports the lumber. The folding legs allow the upper frame to retract completely within the truck bed compartment so as not to protrude over the edge of the truck bed side walls when not in use. Further, the configuration of the present invention provides an unobstructed truck bed in that no portion of the expandable rack except the folding legs occupy space on the truck bed floor, allowing the truck bed to be loaded without having to position the loaded materials over or around the rack. The present invention deploys easily to allow a single person to easily convert the rack from a retracted position to a deployed position.