PROBLEM TO BE SOLVED: To provide a ridge forming machine which can be mounted on various traveling machines with a weight balance suitable for various traveling machines while suppressing manufacturing cost and without making the bending angle of a universal joint excessive. A ridge forming machine includes a machine frame 1 mounted on a traveling machine body, a rotary frame portion 2 which is rotatably supported by the machine frame 1 at one end side thereof, and which is expandable / contractable in a longitudinal direction, and a rotary frame portion. A working part W rotatably supported on the other end side of the frame part 2, and the working part W includes an embankment part 4 equipped with a tilling device 41 for cutting the soil of the original ridge, and a rear part of the embankment part 4. And a ridge forming disk body 5 that presses the soil filled by the embankment portion 4 while rotating to form ridges. The rotating frame portion 2 includes a first rotating frame 21 whose one end side is supported by the machine frame 1 so as to be rotatable, and a second rotating frame 21 which is attached to the first rotating frame 21 so as to be positionally changeable. 22 is further provided. [Selection diagram]【課題】製造原価を抑制すると共に、ユニバーサルジョイントの屈曲角度を過大にする事無く、種々の走行機体に好適な重量バランスで装着可能な畦形成機を提供すること。【解決手段】畦形成機は、走行機体に装着される機枠１と、この機枠１に旋回自在に一端側を支持され、長手方向に伸縮可能な回動フレーム部２と、この回動フレーム部２の他端側に回動可能に支持された作業部Ｗと、この作業部Ｗは、元畦の土壌を切削する耕耘装置４１を備えた盛土部４と、この盛土部４の後方に位置して盛土部４によって盛られた土壌を回転しながら押圧して畦を成形する畦成形ディスク体５と、を備える。回動フレーム部２は、機枠１に旋回自在に一端側を支持される第１回動フレーム２１と、この第１の旋回フレーム２１に対し、位置変更可能に取り付けられた第２回動フレーム２２と、をさらに備える。【選択図】 図１
