Abstract: A rear package tray for hatch back style vehicles is mounted in a trunk compartment of the vehicle such that the rear package tray can be slid back and forth, and can be assembled and disassembled as occasion demands. The rear package tray includes sliding rails fixed to opposite side panels of a trunk compartment of the vehicle, respectively; package tray panels positioned at the sliding rails at opposite ends thereof, connection members mounted at the front and rear ends of the package tray panels, respectively, and utility bars fixed to opposite side parts of the lower surfaces of the package tray panels at opposite ends thereof, each of the utility bars being formed in the shape of a “U.