Abstract: A sliding storage device for the bed of a truck for more easily storing and retrieving items stored in the bed of a truck. The sliding storage device for the bed of a truck includes a sliding storage device for the bed of a truck that includes a bottom wall and a pair of side walls. The sliding storage device comprises a housing. The housing includes a bottom wall, a first side wall, a second side wall, an elongated front wall and an elongated back wall such that the housing has an open top. The bottom wall of the housing extends beyond the side walls such that a pair of flanges are defined. The flanges are movably positioned in a set of rail members. The set of rail members comprises a pair of female slide rails and a pair of males slide rails. The male slide rails are movably extended in the female slide rails.