an elongated lockable rainproof storage container for use transversely at the forward end of a bed of a pickup truck ahead of typical wheel wells to store and protect tools or other valuable personal items . the container has a horizontal bottom to rest on the bed floor , a first vertical rear wall and two vertical end walls fixed relative to the bottom , and a vertically extending fourth wall facing the pickup tailgate . these four walls are of equal height and support in sealed relationship a top rainproof container closure . an elongated rectangular swingable panel forming a large portion of the fourth wall is connected along its lower long edge to the container bottom by an elongated continuous flexible waterproof plastic hinge permitting the panel to swing about ninety degrees inwardly from a vertical wall position to a horizontal floor position lying atop the container bottom where it provides a load supporting upper surface parallel to the bed floor . when the closure is opened or removed and the panel swung down to its horizontal position almost the entire inner area of the container becomes a usable vertically unobstructed storage area supplemental to the area between the container and the tailgate to facilitate hauling large crates , boxes , lumber or sheets of building material . in the vertical position of the swingable panel its opposite ends are held in waterproof sealing engagement with jambs extending inwardly from the container end walls . the container may be of sufficient size to allow the jamb spacing to correspond to wheel well spacing . a sill member extends across the container bottom between the jambs and supports in close relationship , via the elongated hinge , the bottom edge of the swingable panel . the ends of the elongated waterproof hinge and lower ends of seals along the jambs cooperate to assure watertight seals along the bottom and ends of the swingable panel when it is secured in its vertical position . the proximity of the edge of the swingable panel and the sill member substantially conceal the elongated hinge and protect it from damage and wear when the panel is in its horizontal position .