To provide a seedling transplanter capable of suppressing deterioration of a machine body balance.SOLUTION: A seedling transplanter is configured so that: a travel vehicle body 2 comprises a seedling mount table 51 on which a seedling is mounted, the seedling mount table being movable in a lateral direction, a medicine supply device 500 for supplying a medicine to the seedling mounted on the seedling mount table 51, a medicine supply support part 600 for supporting the medicine supply device 500 so as to move freely in a lateral direction, and a controller 900 for moving the medicine supply device 500 along the medicine supply device support part 600. The controller 900 performs medicine supply control so as to supply the medicine while moving the medicine supply device 500 from one side in the lateral direction of the seedling mount table 51 to the other side in the lateral direction according to a lateral position of the seedling mount table 51, or balance movement control for moving the medicine supply device 500 in an opposite direction of the lateral movement direction of the seedling mount table 51.SELECTED DRAWING: Figure 4【課題】 機体バランスの悪化を抑制することが可能な苗移植機を提供すること。【解決手段】 走行車体２に苗を載せる苗載せ台５１を左右方向に移動可能に設け、苗載せ台５１に載置された苗に薬剤を供給する薬剤供給装置５００を設け、薬剤供給装置５００を左右方向に移動可能に支持する薬剤供給装置支持部６００を設け、薬剤供給装置支持部６００に沿って薬剤供給装置５００を移動させる制御を行うコントローラー９００を設け、コントローラー９００は、苗載せ台５１の左右位置により、苗載せ台５１の左右一側から左右他側に薬剤供給装置５００を移動させながら薬剤を供給する薬剤供給制御、または苗載せ台５１の左右の移動方向とは反対方向に薬剤供給装置５００を移動させるバランス移動制御を行う構成とする。【選択図】図４
