The utility model provides a combine harvester. According to the combine harvester, a harvesting portion ascends to the position with the height larger than a specific height, so that a threshing and feeding chain automatically stops, and price is low. The combine harvester is provided with a feeding chain clutch (70) which can be switched between a connection state and a disconnection state freely. In the connection state, transmission to the threshing and feeding chain (FC) is carried out, and transmission to the threshing and feeding chain (FC) is cut off in the disconnection state. Besides, the combine harvester is further provided with a connection rod mechanism (K1) which connects the harvesting portion (B) with the feeding chain clutch (70). When the harvest portion B ascends to the position with the height larger than the specific height, the connection rod mechanism (K1) enables the feeding chain clutch (70) to be switched to the disconnection state.
