PROBLEM TO BE SOLVED: To provide a ridge forming machine including a soil banking part having a large soil banking effect.SOLUTION: In a ridge forming machine 1, a soil banking part 40 includes: a tillage rotor part 408 digging a part of an old ridge and the old ridge base by tillage jaws 401 arranged plurally on a rotation shaft radially, throwing up dug soil to a ridge side to be banked up at a ridge formation location; and a recessed disk 404 facing an obliquely front part in a travel direction front part of the tillage rotor part 408. Soil dug by the recessed disk 404 is discharged to a ridge forming side. The recessed disk 404 can adjust its position to right/left and upward/downward in a travel direction and thereby can cope with a wide range of work conditions.SELECTED DRAWING: Figure 1
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