Abstract: A truck bed partitioning and extension device for use on a bed of a pickup truck is disclosed. The truck bed partitioning and extension device includes a transverse panel having a pair of ends and a pair of side panels. At least one of the side panels is attached to the ends of the transverse panel through a double hinge. The double hinge allows folding along a pair of generally parallel axes that allow the pivoting of the side panel along a first axis that allows the side panel to pivot to a position next to the transverse panel and pivoting of the side panel about a second axis that positions the side panel at a distance from the transverse panel.