The blasting machines with biconical rollers conveyor are designed to work round section products such as pipes and round bars. The biconical rollers allow the simultaneous translation and rotation of the cylindrical bodies. The blasting machine has a blasting chamber, covered internally with wear plates. The turbines are placed on the roof of the chamber, in line with pipes movement. Before and after the blasting chamber the inlet and outlet vestibules are positioned (equipped with polyurethane masks) that have the function of continuously passing the parts to be treated without grit shot escape. The rollers are suitably dimensioned for the loading and unloading of the pieces.