PROBLEM TO BE SOLVED: To make the exhaust structure of a combine harvester, equipped with a reaping part installed at the front part of a traveling machine body, an operating part installed at the rear direction of the reaping part, a threshing device and a recovering part for recovering cereal grains, installed in parallel in the left and right direction of rear direction of the operating part, a discharged straw-treating part installed at the rear direction of the threshing part and an exhaust pipe for exhausting exhaust gas from an engine installed at the lower direction of the operating part, so that the exhaust gas hardly moves toward an operator in the operating part and also straw dusts and mud hardly pile up over the whole part of the exhaust pipe.SOLUTION: This exhaust structure of the combine harvester is provided by passing the exhaust pipe XP as slanting and facing upward between the threshing device 4 and recovering part 5 from the exhaust part 67A of the engine 60, and arranging the exhaust outlet 70C of the exhaust pipe XP at the upper direction of the discharged straw-treating part 8 (54).
