PROBLEM TO BE SOLVED: To provide a seedling transplanter having a seedling platform structure by which a wider seedling-carrying platform region can be secured simply.SOLUTION: The spare seedling-carrying platform can wholly be transferred by one-touch operation to a state in which a first, second and third spare seedling-carrying platforms 38a, 38b and 38c are wholly arranged in a three-layered state and the seedling trays are placed on them, or to a state in which a wide seedling tray-carrying plane is obtained by arranging the first spare seedling-carrying platform 38a and the third spare seedling-carrying platform 38c at the front and rear sides of the second spare seedling-carrying platform 38b respectively by centering the second spare seedling-carrying platform 38b.COPYRIGHT: (C)2011,JPO&INPIT【課題】簡単に、しかも広い苗載置台領域を確保できる苗台構成を備えた苗移植機を提供する。【解決手段】全体として上下三段に配置される第1,第2,第3予備苗載台38a,38b,38cに分けて苗トレイを載置する状態と第2予備苗載台38bを中心とし、その前後に第1予備苗載台38aと第3予備苗載台38cが配置さして広い苗トレイ載置平面が得られる全体にワンタッチで配置替えすることができる予備苗載台である。【選択図】図5