PROBLEM TO BE SOLVED: To store a large amount of grains while arranging a DPF at a lower part of a grain tank.SOLUTION: A first grain lifer (14) is arranged in a region between a thresher (5) and a grain tank (6), an inclined wall (21D) downwardly inclining toward a right side is formed at a lower part of a left-side wall of the grain tank (6), an engine (9) arranged in front of the grain tank (6) is attached to a machine pedestal (41) via an engine mount, a DPF unit (40) which purifies an exhaust gas of the engine (9) is connected to an exhaust manifold (30B) of the engine (9) via a connecting pipe (50) having a flexible tube (52) having elasticity, and the DPF unit (40) is supported from the machine pedestal (41) side via a frame (42) so as to be arranged in a region approximate to a lower face of the inclined wall (21D).
