Abstract: A collapsible ladder rack system for use on pickup truck or similar vehicle. The rack system includes housings, main arms, material arms, extension arms, and supporting braces. The housings are secured to the rails. The hinged main arms rise vertically and are locked into place by braces. The hinged material arms rise horizontally and lock into place with braces. The extension arms telescope out of two of the material arms and insert into the empty material arms and lock into place. When the ladder rack is no longer needed, the steps are reversed so that the other rack components collapse into the housings on the bed rails. Accessory components can be mounted on the rack to enhance the capabilities of the system.