To provide a combine harvester preventing a mounting part of an auxiliary transportation driving case for driving an auxiliary transportation apparatus from loosening by vibration of a machine body.

There are provided a horizontal frame extended in the left and right width directions and installed in a reaping part, a lifting and lowering frame extended in the front and rear directions and provided freely rotatably in the vertical directions in the horizontal frame and a reaping part liftable and lowerable by rotating the lifting and lowering frame in the vertical directions. In the combine harvester, a connecting frame is installed between the horizontal frame and the lifting and lowering frame to form a truss structural part. The auxiliary transportation driving case for driving the auxiliary transportation apparatus is installed between the lifting and lowering frame and the connecting frame forming the truss structural part.