NOVELTY - The structure has a rear floor frame (13) placed behind a rear seat of a vehicle in a transverse direction of a body of the vehicle. A pair of guide frames (12) is installed in parallel with one another behind the rear floor frame in a longitudinal direction of the vehicle body. A lower frame (14) is attached on under side of an integrated package (11) such that the lower frame moves along the guide frames. The lower frame comprises a pair of guide groove sections, and the rear floor frame is provided with fixing protrusions (17) that are protruded upward.    USE - Frame structure for vertically mounting an integrated package e.g. electrical equipment such as traction motor and secondary battery, on a rear floor panel of a vehicle e.g. electric vehicle, hybrid motor vehicles such as passenger automobile, sports utility vehicle, bus, truck and commercial vehicle. Can also be used for watercraft such as boat and ship, and aircraft.    ADVANTAGE - The structure vertically mounts the integrated package on a rear floor frame of the vehicle body by spot-welding without any modification of the rear floor of the vehicle, thus preventing mold development cost and avoiding quality degradation due to collision between a vehicle body's package tray and the integrated package. The structure enables the integrated package to be stably held in position so as to be accurately seated on a mounting location. The structure reduces the number of in-line work processes for insertion of the integrated package into the vehicle. The structure allows the package to be mounted on the guide frames without using an additional connecting bracket member installed on the integrated package, thus ensuring the structural rigidity of the rear floor of the vehicle body.    DESCRIPTION OF DRAWING(S) - The drawing shows a pictorial perspective view showing a frame structure for vertically mounting an integrated package into a vehicle.    Integrated package (11)    Guide frames (12)    Rear floor frame (13)    Lower frame (14)    Fixing protrusions (17)