PURPOSE: To improve straight drive performance and running performance by subjecting a grain discharge anger to turning control so as to always an equal load be applied to a lateral running device of combine.

CONSTITUTION: In a combine provided with a grain storage device 2 having a grain discharge auger 1 and lateral running devices 3 and 3, a turning means 4 for turning the grain discharge auger 1 is provided in the grain discharge auger 1 and, simultaneously, load detection means 5 and 5 for detecting a load applied to the lateral running devices 3 and 3 is provided in the above-mentioned lateral running devices 3 and 3. An engaging means 6 for operating the above- mentioned turning means 4 based on detection result of the load detection means 5 and 5 is provided in these lateral running devices 3 and 3 to constitute the objective balance controller of combine.