PROBLEM TO BE SOLVED: To solve a problem wherein conveyance of seedling containers in small-scale seedling raising work is hard labor because the seedling containers are manually conveyed by hand.SOLUTION: There are provided: a seedling device 12 for raising seedlings with seedling containers A for a prescribed period of time and a method for conveying seeded seedling containers. The method for conveying seeded seedling containers includes: temporarily lifting a seeded container A on a first stage by vertical support frame bodies 27 of a stacking unloading device 10 at a prescribed position in the vicinity of the seedling device 12, and leaving the lifted seedling container A in the standby state receiving a seeded seedling container A on a second stage under the seeded seedling container A on the first stage lowering the seedling container A on the first stage together with the vertical support frame bodies 27 to the received seedling container A on the second stage and stacking the seeded seedling containers A on the two stages in the vertical direction conveying the stacked seedling containers A on the two stages by a transfer table 11 for conveyance to the seedling device 12 by pushing preceding stacked seedling containers A on the two stages by following stacked seedling containers A on the two stages fed by a transfer table 1 for seeding to move on the transfer table 11 for conveyance and bringing the seeded seedling containers A conveyed to the terminal end of the transfer table 11 for conveyance into the seedling device 12 to raise the seedlings for a prescribed period of time.COPYRIGHT: (C)2012,JPO&INPIT【課題】小規模育苗作業における育苗容器の搬送が人手による手作業で行うため、重労働であるという課題がある。【解決手段】育苗容器Aごと所定期間育苗する育苗器12と、該育苗器12の近傍所定位の重ね出し装置10の上下支持枠体27により播種済みの一枚目育苗容器Aを一旦持ち上げて待機させ、播種済みの一枚目育苗容器Aの下に播種済みの二枚目育苗容器Aを受け入れ、受け入れた二枚目育苗容器Aに前記上下支持枠体27ごと一枚目育苗容器Aを下降させて上下二段に重ねて播種済み育苗容器Aを積み上げ、二段積み育苗容器Aを搬送用移送台11により、播種用移送台1により送り出される後続の二段積み育苗容器Aにより先行二段積み育苗容器Aを押して搬送用移送台11上を移動させて前記育苗器12にまで搬送し、前記搬送用移送台11の終端に搬送された播種済み育苗容