To provide a seedling transplanting machine in which seedling planting performance is improved.SOLUTION: A seedling transplanting machine 1 concerning the one aspect of the embodiment includes: a seedling tank 70 fitted behind a traveling vehicle body 2, and having mat seedlings placed thereon; a supporting part 72b provided below the seedling tank 70, supporting a lower end of the mat seedlings placed on the seedling tank 70, and formed of a seedling outlet 73 where the seedlings are taken out of the mat seedlings; a seedling pressing part 71 reciprocating in the width direction of the traveling vehicle body 2 with the seedling tank 70, and preventing the mat seedlings from falling into the rear; and a regulation part 72c provided downward from the seedling pressing part 71, and regulating the movement to the rear of the mat seedlings.SELECTED DRAWING: Figure 3【課題】苗植え付け性能を向上させる苗移植機を提供すること。【解決手段】実施形態の一態様に係る苗移植機1は、走行車体2の後方に取り付けられ、マット苗が載置される苗タンク70と、苗タンク70の下方に設けられ、苗タンク70に載置されたマット苗の下端を支持するとともに、マット苗から苗が取り出される苗取出口73が形成された支持部72bと、苗タンク70とともに、走行車体2の幅方向に往復動し、マット苗が後方へ落ちることを防止する苗押さえ部71と、苗押さえ部71よりも下方に設けられ、マット苗の後方への移動を規制する規制部72cとを備える。【選択図】図3