PROBLEM TO BE SOLVED: To provide a working machine which is connected to a rear end side of a traveling machine body so as to be able to move up and down and performs weeding work in a field scene. The challenge is to provide. SOLUTION: A main frame connected to a rear end side of a traveling machine body via an elevating link so as to be able to ascend and descend, a sensing float for detecting a state of a field, and a vertical position can be adjusted at a rear side of a rear wheel of the traveling machine body. A groove forming device that is supported on the field side and can be switched between a working position that acts on the field side and a retracted position that is retracted from the field side； and a working position that is supported on the rear side of the main frame and that acts on the field side. And a weeding body supported so as to be vertically swingable so as to be switched to a retracted posture retracted to the upper side, and either one of the weeding body and the groove shaper can be acted on the field side. Configured to be able. [Selection diagram] Figure 10【課題】走行機体の後端側に昇降可能に連結されて圃場面での除草作業を行う作業機において、除草作業の他に、圃場に溝を成形する溝成形器としても兼用可能な作業機を提供することを課題としている。【解決手段】昇降リンクを介して走行機体の後端側に昇降可能に連結されるメインフレームと、圃場の状態を検知する感知フロートと、前記走行機体の後輪の後方側で上下位置調整可能に支持されて、圃場側に作用する作用姿勢と圃場側から退避させた退避姿勢とに姿勢切換可能な溝成形器と、前記メインフレームの後方側に支持されて、圃場側に作用する作用姿勢と、上方側に退避される退避姿勢とに切換えられるように上下揺動可能に支持された除草体とを備え、前記除草体と前記溝成形器の何れか一方を圃場側に作用させることができるように構成した。【選択図】図１０
