Abstract: An apparatus for weighing transport vehicles in motion, wherein at least two measuring units are electrically connected with a recording unit, each comprising a load platform which bears on a dynamometric pickup load cell at a supporting point and is connected to a supporting structure by means of four rods installed in pairs at two sides of said load platforms, directed to one end thereof and secured at one end on said supporting structure and at the other end on the side surfaces of the load platform in immediate proximity to the geometric line which is a projection of the vertical line through the supporting point of said platform onto the respective side thereof, said load platform bearing on the load cell at a geometric point whose vertical displacement due to an arbitrary moment of forces acting upon the load platform and causing elastic deformation of the rods is equal to zero.