Abstract: A concrete leveler comprises rails that are laid on both sides of a poured concrete surface, a traveling beam that spans the rails and freely travels along them, a traveling unit that is mounted so as to be freely movable along the beam in a direction perpendicular with respect to the direction of travel of that beam, and a concrete leveler portion that is provided to the traveling unit, and wherein this concrete leveling portion has a screw that is axially mounted so as to be freely and rotationally driven between support legs of the traveling unit, and that crosses a direction of travel of the traveling unit.