PROBLEM TO BE SOLVED: To provide a combine improving an environment of attaching an exhaust treatment device.SOLUTION: The combine includes: an operation steering part a diesel engine arranged on a lower side of the operation steering part and an exhaust treatment device 33 introducing exhaust gas of the diesel engine and performing purification treatment of the exhaust gas. The exhaust treatment device 33 is arranged in a state in which a part of the exhaust treatment device enters into a lower space of the operation steering part and an upper side of the exhaust treatment device 33 is covered by a cover 36 supported by the operation steering part and the operation steering part.SELECTED DRAWING: Figure 8