PROBLEM TO BE SOLVED: To provide a ridge forming machine which can expand an adjustment height of ridge forming in which a rotary board member is exchangable to be capable of changing it to a rotary board member having a different outer diameter size to expand the adjustment height of the ridge forming, correspond to working conditions such as characteristics of district, climate, and soil and high ridge in recent years, and improve flexibility of the ridge forming.SOLUTION: In a ridge forming machine, a rotation axis Pof a lower rotary ridge forming body 13 is arranged to be inclined upward by a prescribed angle θ from a lateral side of one side face Wof a ridge W to the ridge side. A rotation axis Pof an upper rotary ridge forming body 14 is arranged to be inclined downward by a prescribed angle α from an upper side of the lower rotary ridge forming body to a top face Wof the ridge. A rotation board member 14e is exchangably arranged in the upper rotary ridge forming body along a periphery of the lower rotary ridge forming body, and a height adjusting mechanism 17 is arranged performing vertical motion of the upper rotary ridge forming body along the periphery of the lower rotary ridge forming body.SELECTED DRAWING: Figure 6
