PURPOSE:To provide the subject device permitting the easy supply of seedlings and preventing the shift of the seedlings due to the vibration of a frame, etc., in planting travels by constituting the upper end portions of dividing walls for dividing the upper surface of a seedling deck in a state capable of being laterally tilted on the lower portions of the dividing walls. CONSTITUTION:Plural dividing walls 9 are projectedly disposed over the whole length of the seedling surface 8 of a seedling deck 3 to divide the seedling deck 8 into lateral plural rows of seedling sections. The upper end portions 9a of the dividing walls 9 are constituted in a state capable of being laterally tilted on the lower end portions and. when seedlings are supplied on the seedling deck 3, the upper end portions 9a of the dividing walls 9 are laterally transferred, thereby permitting to insert the seedlings from the tilted direction. When the supply of the seedlings is finished, the dividing walls 9 are returned to the original positions, respectively, to prevent the lateral shifts of the seedlings supplied.
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