To provide a harvesting machine capable of certainly avoiding that a harvesting part contacts to field and soil is taken in during harvesting and that grains are left behind.SOLUTION: In a harvesting machine, a control device 80 executes harvest height control where operation of a lifting drive unit 75 is controlled based on detection by a cutting height sensor 30 so that the cutting height of a cutting unit 2 is kept at a controlled target cutting height, horizontal control where operation of a swing drive unit 76 is controlled so that roll posture of the cutting unit 2 is kept in a posture parallel with the ground, and controlled state switching control where controlled state during the harvesting operation is switched based on whether or not a specific requirement is satisfied to a simultaneous controlled mode where the harvest height control and the horizontal control are executed simultaneously, to a cutting height priority mode where the harvest height control is prioritized, or to a horizontal control priority mode where the horizontal control is prioritized.SELECTED DRAWING: Figure 7【課題】収穫作業中に刈取部が圃場に接触して土を取り込んでしまう虞や穀粒の取り残しが生じる虞などを確実に回避できるようにする。【解決手段】収穫機において、制御装置８０が、刈り高さセンサ３０の検出に基づいて、刈取部２の刈り高さが制御目標刈り高さに維持されるように昇降駆動ユニット７５の作動を制御する刈り高さ制御と、刈取部２のロール姿勢が対地平行姿勢に維持されるように揺動駆動ユニット７６の作動を制御する水平制御とを実行し、かつ、特定条件が成立したか否かに基づいて、収穫作業時の制御状態を、刈り高さ制御と水平制御とを同時に実行する同時制御状態と、刈り高さ制御を優先して実行する刈り高さ制御優先状態と、水平制御を優先して実行する水平制御優先状態とに切り換える制御状態切り換え制御を実行する。【選択図】図７
