Vehicle body provided with a metallic supporting structure having a plurality of rods, mutually fastened so as to form a three-dimensional rigid frame. The vehicle body further having a plurality of inflatable elements, filled with air or other gas. The vehicle body is fastened to the supporting structure and forms panels between the rods of the supporting structure. The inflatable elements are formed by a pair of walls made of composite plastic material, welded together along their perimeter so as to form an airtight body. The inflatable elements are inflated by means of injection of a set amount of air or other gas therein.