Self-supporting refrigerated truck comprising a floor, two side walls, a front bulkhead and a roof. The components are all constructed as sandwich panels. The connection between the rear axle construction of the refrigerated truck and the front is not provided with longitudinal beams. The function of the chassis is taken over by the side walls, which are capable of absorbing loads because the skin and sandwich panels of the side walls have appreciable strength and a fill of appreciable compressive strength is also provided. In order to transmit forces into the side walls it is proposed to accommodate the vertically extending trusses in the side walls, which trusses are joined to cross-members of the rear axle construction which extend over the entire width. The fixing for the floor and each side wall comprises a section which has four flanges, which preferably extend perpendicularly, with a first flange close to the inner limit of the side wall, a second flange close to the top of the floor, a third flange as a continuation of the second flange and extending in the thickness of the side wall and a fourth flange comprising a continuation of the first flange in the floor or the boundary between floor and side wall.