PROBLEM TO BE SOLVED: To provide a corn harvester that facilitates performing residual culm treatment well even in a place where a farm field surface for the residual culm treatment is partially recessed.SOLUTION: A corn harvester includes a lifting drive unit 8 capable of vertically changing a position of a residual culm-treating unit 5 relative to a traveling vehicle body. The residual culm-treating unit 5 is connected to the traveling vehicle body so that following movement is possible while being grounded, and is provided with lowering permission means 7 for permitting movement to the lowering side of the residual culm-treating unit 5 in a state where the residual culm-treating unit 5 is grounded and the lifting drive unit 8 is stopped in lowering drive.COPYRIGHT: (C)2015,JPO&INPIT【課題】残稈処理対象の圃場面が部分的に凹入しているような箇所でも残稈処理を良好に行い易いトウモロコシ収穫機を提供する。【解決手段】残稈処理装置5を走行車体に対して上下位置変更可能な昇降駆動装置8が備えられ、残稈処理装置5は接地状態で追従移動可能であるように走行車体に連結され、残稈処理装置5の接地状態で、かつ昇降駆動装置8の駆動下降停止状態で、残稈処理装置5の下降側への移動を許容する下降許容手段7が備えられた。【選択図】図3
