PROBLEM TO BE SOLVED: To provide a seedling transplanter provided with a seedling planting apparatus attached to the machine body vertically movable by the lifting or lowering motion of wheels with a hydraulic cylinder and a controlling apparatus to control the planting depth of the seedling planted by the planting apparatus by vertically moving the wheel with the hydraulic cylinder according to the vertical motion of the grounding member contacting with the ridge surface, to facilitate the work difficult to perform while supporting the machine body with wheels even without using a jack and to solve the problem of the deformation, etc., of the grounding member of a controlling apparatus caused by the application of the weight of the machine body according to the leakage of a hydraulic oil in a hydraulic cylinder for the lifting motion of the machine body and the gradual lowering of the body when the machine body is left in a warehouse, etc., for a long period. SOLUTION: A stand 80 for supporting a machine body is placed in a state movable from a position without supporting the machine body to a position supporting the body when the body is lifted by lowering the wheels 7. When the stand is moved to the body-supporting position and the wheel 7 is lifted to lower the machine body, the stand is brought into contact with the ground to float the grounding member 71 of the controlling apparatus 70 and support the body.
