Problem to be solved: to provide a working machine capable of adjusting the position of the chair in response to changes in the height of the internodes or the height of the rice plant planted.A working machine is a first ground plane machine mounted on the rear portion of the traveling body, a second ground work machine mounted on the rear portion of the first ground plane machine and planting a seedling into the field, and a chair which is disposed above the first ground plane machine and is operated by the worker who works on the second ground plane A position adjusting mechanism capable of adjusting the position of the chair to the second ground working machine is provided.Diagram【課題】植え付けられる苗の条間や畝の高さの変更等に対応して椅子の位置を調整することができる作業機を提供すること。【解決手段】作業機は、走行体の後部に装着される第1対地作業機と、前記第1対地作業機の後部に装着され且つ圃場に苗を植え付ける第2対地作業機と、前記第1対地作業機の上方に配置され且つ前記第2対地作業機に対して作業をする作業者が座る椅子と、前記第2対地作業機に対する前記椅子の位置を調整可能な位置調整機構と、を備えている。【選択図】図43