The harvester (1) has a digging element which is arranged in travel direction (F). The screen conveyor (2) is provided with screen conveyor belt (4) and guide elements (3) for laterally supporting the belt. The screen conveyor belt is provided with an upwardly facing conveying stretch portion (5) and leading return pulley proximal to the digging element. The conveying stretch portion is provided for forming a screening zone. The screen conveyor belt provided in the area of the conveying stretch portion is adjusted with respect to different conveying slants.
