Abstract: This invention is directed to a truck cargo bed cover system which includes a hinge assembly for pivotally and removably connecting at least one cover panel member to a truck having a cargo bed. The subject hinge assembly comprises hinge support means attached to the truck for pivotally connecting each of the cover panel members to the truck. The cover panel member, in a closed position, covers the truck cargo bed and, in an open position, permits access to the cargo bed. Hinge connector means are joined to a first side of each cover panel member for pivotally and removably connecting and disconnecting the cover panel member, respectively, to and from the hinge support means. Each hinge connector means is therefore readily connectable to and disconnectable from the hinge support means for readily attaching and removing the cover panel member from the truck.