PROBLEM TO BE SOLVED: To make a combine harvester capable of avoiding the local temperature elevation of an exhaust pipe line while suppressing the generation of soil dust caused by exhaust, although installing an exhaust muffler at the upper part of an engine and exhausting engine exhaust gas in the rear lower direction of a traveling machine body.SOLUTION: This combine harvester is provided by installing an exhaust pipe 43 guiding and exhausting the flow of exhaust gas from the exhaust muffler 41 toward the rear lower direction of the traveling machine body linearly by making it pass through between a threshing device and a grain recovery part from an exhaust port 42a of the exhaust muffler 41, and also including a guiding surface 44a having a crossing angle to the axial core 43d of the exhaust pipe 43 and arranging a flow guide 44 guiding the exhaust gas of the exhaust pipe 43 so as to flow toward the rear direction of the traveling machine body by the guiding surface 44a, at the lower side of the exhaust port 43a of the exhaust pipe 43.COPYRIGHT: (C)2012,JPO&INPIT【課題】排気マフラーをエンジンの上部に設けるとともにエンジン排気を走行機体の後部下方に排出するものでありながら、排気による土ほこりの発生を抑制しながら排気管路の局所的な温度上昇を回避できるようにする。【解決手段】排気マフラー41からの排気を流動案内して排出する排気管43を、排気マフラー41の排気口42aから脱穀装置と穀粒回収部との間を通して走行機体の後部下方に向けて直線状に設けてある。排気管43の軸芯43dに対して交差する角度の案内面44aを備えて、排気管43の排気を案内面44aによって走行機体後方向きに流動するように案内する流動ガイド44を、排気管43の排出口43aの下側に配置してある。【選択図】図5
