PROBLEM TO BE SOLVED: To stably hold a seedbed piece and to release the holding piece of the seedbed piece in a stable manner, and to prevent the seedlings from being adversely affected. SOLUTION: The gripping device 60 is a gripping device 60 for gripping a seed bed piece C3 on which seedlings are planted, and at least one set of gripping members 65 provided so as to be relatively movable along a first direction. And at least one set of tip portions 66 provided at the tips of the pair of gripping members 65 and capable of gripping at least two opposite side surfaces of the nursery piece C3, the relative position of the pair of gripping members 65. The set of tip portions 66 can approach and separate from each other along the entire length of the tip portion 66 while maintaining the same distance. [Selection diagram] Fig. 16【課題】苗床片を安定的に把持するとともに、安定的に苗床片の把持を解放することができ、苗に悪影響が及ぶのを抑制する。【解決手段】把持装置６０は、苗が植え付けられた苗床片Ｃ３を把持する把持装置６０であって、第１の方向に沿って相対的に移動可能に設けられた少なくとも一組の把持部材６５と、一組の把持部材６５の先端に設けられ、苗床片Ｃ３の少なくとも二つの対向した側面を挟んで把持可能な少なくとも一組の先端部６６と、を備え、一組の把持部材６５の相対的な移動に伴い、一組の先端部６６は当該先端部６６の全長に渡って、互いの距離が等しい状態を維持したまま互いに接近及び離間可能である。【選択図】図１６
