PROBLEM TO BE SOLVED: To propose a combine harvester which includes an exhaust system being not excessively heated, and excellent in durability, and has enhanced safety in maintenance work being conducted with its grain tank opened.SOLUTION: An air intake port (11A) of a fan (11) is opened at a side face of a threshing device (5), an exhaust gas purification device (40) for purifying the exhaust gas of an engine (9) is arranged in a space (S1) formed between the threshing device (5) and the grain tank (6), one side of the exhaust gas purification device (40) faces the air intake port (11A), and a cover member (42) is arranged so as to cover a part from the other side of the exhaust gas purification device (40) to the upper side thereof. Thus the problem is solved.
