Provided for is a vehicle lifting device, of the type adapted to allow the demounting and the re-mounting of the lower parts of the body and/or of the mechanical parts of the vehicle, said lifting device (2) being provided with liftable platforms (3); said lifting device is characterized in that the lifting and the lowering of said liftable platforms occurs by exploiting the same energy that moves the lifting device, hence moving the aforementioned lifting device allows also actuating the mechanism of opening and closure of each of the liftable platforms (3), which provides for the lifting/opening and lowering/closure of said platforms.