PROBLEM TO BE SOLVED: To purify nitrogen oxide in exhaust gas discharged from a DPF unit by a urea selective catalytic reduction device.SOLUTION: A combine-harvester comprises: a travel device (3) provided under a machine body (2) a thresher (5) provided on either one of left and right sides of the machine body (2) a grain tank (6) for storing grains, which is provided on the other side of the machine body (2) and an engine (9) in an engine room (E) provided on the front side of the grain tank (6). A urea selective catalytic reduction device (70) for purifying nitrogen oxide in exhaust gas after the passage of a DPF unit (40), which captures and purifies fine particles in the exhaust gas of the engine (9), is disposed above the DPF unit (40). The DPF unit (40) and the urea selective catalytic reduction device (70) are disposed in a space (S1) formed between the thresher (5) and the grain tank (6).SELECTED DRAWING: Figure 9
