PROBLEM TO BE SOLVED: To provide a transplanter that can stabilize an action of removing a cell-molded seedling from a seedling tray.SOLUTION: A transplanter 10 removes a cell-molded seedling from a seedling tray 70 and transplants the same onto a ridge, while performing a longitudinal feed action or a transverse feed action of the seedling tray 70. The longitudinal feed action of the seedling tray 70 is performed by the rotational driving of a drive shaft 34. The transplanter comprises a supporting member 43 that supports a bottom surface of the seedling tray 70 from a drive shaft 34 side while the seedling tray 70 is being conveyed to substantially form an arc in the vicinity of the drive shaft 34.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT