Abstract: A storage unit for mounting in the box of a pickup truck. The storage unit has a base which is anchorable to the bed of the pickup truck box. A substantially vertical support stanchion is mounted to the base. Storage shelves are pivotably mounted to the support stanchion so that each storage shelf is pivotable about the stanchion independently of the others. Mechanisms are provided for locking each storage shelf in first and second selected angular positions about the support stanchion. In the first selected angular position, the storage tray is located within the pickup box. In the second selected angular position, the storage tray extends outwardly through the tailgate opening at the rear of the pickup box.