Abstract: A rear dump truck for transporting particulate material and simultaneously discharging and sieving the material. The rear dump truck includes a load box divided into a front section and a rear section by a partition dump door. The front section of the box forms a load chamber space for carrying the particulate material and the rear section forms a load chamber space including wire sieves for sieving purposes. To adjust the flow rate of the particulate material passing from the front section into the rear section through below the partition dump door upon the tilting up of the box, a stopper which is tiltable by a hydraulic jack is positioned just before the partition dump door. The particulate material is supplied in a suitable amount at a given time through the adjustment of the tilting of the stopper and passes onto the wire sieves. The material is sieved and the sieved particles are discharged through rear dump doors according to the particle sizes.