The utility model provides a common combine harvester. The configuration structure of a transmission mechanism for transmitting positive driving force and negative driving force to a harvesting part is designed, so that the center of gravity of the machine cannot be lifted. A positive harvesting transmission mechanism (48) consist of a transmission mechanism, and the mechanism transmits driving force branched from a threshing driving system for transmitting engine power to a threshing device (5) to a power input part (47) of a feeder (4A); a negative harvesting output part (74) for outputting negative driving force to a harvesting part (4) is arranged in a gear box (7) provided with a speed change mechanism for changing the speed of a driving system of a running device (10); and a negative harvesting transmission mechanism (A) consists of the negative harvesting output part (74) and a transmission mechanism (24) for transmitting power from the negative harvesting output part (74) to the power input part (47) of the feeder (4A).