PROBLEM TO BE SOLVED: To provide a field working machine having a canopy which has a high degree of freedom in the shape of a support portion and whose vertical position can be changed. SOLUTION: A traveling machine body C capable of traveling in a field, a work device W capable of working on the field, a riding section 25 provided on the traveling machine body C over the lateral width of the traveling machine body C, and a traveling machine body C. A first support portion 54B that is erected from the rear portion, a second support portion 54A that can extend above the first support portion 54B, and a second support portion 54A that is provided on the first support portion 54B and can hold the position of the second support portion 54A A holding mechanism 55 and a canopy 50 that is placed and supported by the second support portion 54A and covers the riding portion 25 from above, and is arranged in the second support portion 54A in the longitudinal direction of the second support portion 54A. Are provided with a plurality of engaging protrusions, and the holding mechanism 55 is formed with an engaging recess that can engage with the engaging protrusions. [Selection diagram] Figure 1【課題】支持部の形状の自由度が高く、上下位置の変更が可能なキャノピを有する圃場作業機の提供。【解決手段】圃場を走行可能な走行機体Ｃと、圃場に対する作業が可能な作業装置Ｗと、走行機体Ｃの横幅に亘って走行機体Ｃの上に設けられる搭乗部２５と、走行機体Ｃの後部から立設される第一支持部５４Ｂと、第一支持部５４Ｂの上方に延出可能な第二支持部５４Ａと、第一支持部５４Ｂに設けられるとともに第二支持部５４Ａを位置保持可能な保持機構５５と、第二支持部５４Ａに載置支持されて搭乗部２５を上方から覆うキャノピ５０と、が備えられ、第二支持部５４Ａに、第二支持部５４Ａの長手方向に並ぶ状態で複数の係合突起部が設けられ、保持機構５５に、係合突起部と係合可能な係合凹部が形成されている。【選択図】図１
