To provide a harvester capable of adjusting drive sensitivity in drive control for controlling ground height of a reaping part.SOLUTION: A harvester comprises: a reaping part which is supported to a machine body so as to be lifted up and down for reaping planted grain culm in a farm field; an actuator 11 for operating the reaping part so as to be lifted up and down; a reaping height sensor 36 for detecting current ground height H of the reaping part; a reaping height control part 52 for executing drive control for controlling driving of the actuator 11 so that ground height of the reaping part approximates target ground height HT on the basis of the current ground height H and the preset target ground height HT; a pattern determination part 51 for determining a control pattern of the drive control for outputting the control pattern to the reaping height control part 52; and an operation tool 56 capable of commanding a drive sensitivity of the actuator 11 by manual operation. The pattern determination part 51 changes the control pattern on the basis of a command value by the operation tool 56, and the reaping height control part 52 executes drive control on the basis of the control pattern.SELECTED DRAWING: Figure 7【課題】刈取部の対地高さを制御する駆動制御において、駆動感度が調整可能な収穫機の提供。【解決手段】機体に上下昇降可能に支持され、圃場の植立穀稈を刈り取る刈取部と、刈取部を昇降操作するアクチュエータ11と、刈取部の現状対地高さHを検出する刈高さセンサ36と、現状対地高さHと予め設定された刈取部の目標対地高さHTとに基づいて、刈取部の対地高さが目標対地高さHTに近づくように、アクチュエータ11の駆動を制御する駆動制御を実行する刈高さ制御部52と、駆動制御の制御パターンを決定して、刈高さ制御部52に対して制御パターンを出力するパターン決定部51と、人為的操作によってアクチュエータ11の駆動感度を指令可能な操作具56と、が備えられ、パターン決定部51は、操作具56による指令値に基づいて制御パターンを変更し、かつ、刈高さ制御部52は、制御パターンに基づいて駆動制御を実行する。【選択図】図7