PROBLEM TO BE SOLVED: To significantly reduce possibility that the divider and the reaping blade device of a reaping part are brought into contact with a farm field surface and damaged.SOLUTION: In a combine harvester 1 equipped with a traveling machine 1a for increasing and decreasing a vehicle speed according to the operation of a main speed change lever 24, the reaping part 2 liftably and lowerably connected to the front part of the traveling machine 1a, and a control part 34 for controlling the reaping height of the reaping part 2, the combine harvester is equipped with a pitching reaping height controller 34a that determines the sudden deceleration operation of vehicle speed by the main speed change lever 24, assumes the forward tilted pitching of the traveling machine 1a following the sudden deceleration of vehicle speed, and automatically raises the reaping part 2 to a prescribed height when the sudden deceleration is determined.COPYRIGHT: (C)2013,JPO&INPIT【課題】刈取部のデバイダや刈刃装置が圃場面に接触して破損する可能性を大幅に低減させる。【解決手段】主変速レバー24の操作に応じて車速が増減される走行機体1aと、該走行機体1aの前部に昇降自在に連結される刈取部2と、該刈取部2の刈高さを制御する制御部34とを備えるコンバイン1において、主変速レバー24による車速の急減速操作を判断するとともに、該急減速操作を判断したとき、車速の急減速に伴う走行機体1aの前傾状のピッチングを想定し、刈取部2を所定の高さまで自動的に上昇させるピッチング刈高さ制御手段34aを備える。【選択図】図9
