Automatic driving method, combine harvester and automatic driving system

The invention provides an automatic driving method, a combine harvester and an automatic driving system which can eliminate blocking of grain stalks generated in a harvesting part under the condition that no burden is brought to an operator. A combine harvester (1) is provided with: a harvesting unit (3) for harvesting grain stalks in an uncut region; a detection unit (20) that detects clogging of grain stalks in the harvesting unit (3); and a control device (50) that functions as a harvesting control unit (63) that controls the harvesting unit (3). The harvesting unit (3) is provided with: a gathering auger (16) that can rotate and gathers grain stalks harvested from an uncut region; and a conveyor (18) that can rotate and conveys the harvested grain stalks. The harvesting control unit (63) interrupts the harvesting of the grain stalks by the harvesting unit (3) when the detection unit (20) detects clogging of the grain stalks regardless of the automatic harvesting travel or the manual harvesting travel, and