To provide a combine which meets the demand that exhaust is discharged at low temperature to outside by improving cooling effect by introduction of ambient air as much as possible.SOLUTION: The combine comprises: an exhaust pipe 41 in which exhaust from an engine 6 arranged below an operation part flows. The exhaust pipe 41 is extended to a rear of a machine body through a space between a thresher and a grain storage part, while an outlet 43 for discharging the exhaust to outside is at a position higher than an inlet 44 into which the exhaust from the engine 6 is supplied. The exhaust pipe 41 comprises； a first pipe part 41A having the inlet 44； and a second pipe part 41B which has diameter larger than that of the first pipe part 41A, and which is connected to a rear end of the first pipe part 41A, and ambient air can be introduced from a space between a periphery of a rear end of the first pipe part 41A and a periphery of a front end of the second pipe part 41B, and the first and second pipe parts 41A, 41B are connected to each other at a front side position of the exhaust pipe 41.SELECTED DRAWING: Figure 4【課題】外気の導入による冷却効果をできるだけ高めて、排気の温度を低くした状態で外部に排出させることが望まれていた。【解決手段】運転部の下方に位置するエンジン６からの排気が通流する排気管４１が備えられ、排気管４１は、エンジン６からの排気が供給される入口４４よりも排気を外部に排出する出口４３の方が高い位置になる状態で、脱穀装置と穀粒貯留部との間を通って機体後部まで延ばされ、排気管４１は、入口４４を有する第一管部分４１Ａと、第一管部分４１Ａよりも大径で且つ第一管部分４１Ａの後端に接続された第二管部分４１Ｂとを備えるとともに、第一管部分４１Ａの後端部の外周と第二管部分４１Ｂの前端部の外周との間から外気を導入可能であり、第一管部分４１Ａと第二管部分４１Ｂとが排気管４１の前側箇所にて接続されている。【選択図】図４
