PROBLEM TO BE SOLVED: To provide a seedling transplanting machine in which a front wheel and a rear wheel are made compatible, and the productivity is high.SOLUTION: A seedling transplanting machine is mounted with right and left traveling transmission cases 13 for transmitting the driving force to right and left running wheels, respectively, in a traveling vehicle body, and is provided with a seedling planting unit in the traveling vehicle body, and also is detachably provided with an auxiliary operation unit containing a fertilizing unit for supplying fertilizers in fields and a leveling unit for leveling the fields. The seedling transplanting machine is configured as follows: an auxiliary transmission case for transmitting the driving force to the auxiliary operation unit is mounted to the right and left traveling transmission cases detachably and in a mounting posture changeable manner, respectively the mounting posture of the right and left auxiliary transmission cases is different when transmitting to the fertilizing unit and when transmitting to the leveling unit and a right and left interval between the right and left running wheels is changed, when changing the direction of mounting the right and left running wheels to the right and left traveling transmission cases.SELECTED DRAWING: Figure 10COPYRIGHT: (C)2017,JPO&INPIT【課題】前輪と後輪の互換性を持たせた生産性の高い苗移植機を提供する。【解決手段】走行車体に左右の走行輪に駆動力を伝動する左右の走行伝動ケース13を各々装着し、走行車体に苗植付部を設けると共に、圃場に肥料を供給する施肥装置や圃場を整地する整地装置を含む補助作業装置を着脱自在に設けた苗移植機において、左右の走行伝動ケースに、補助作業装置に駆動力を伝動する補助伝動ケースを各々着脱可能で且つ取付姿勢を変更可能に装着し、左右の補助伝動ケースの取付姿勢は、施肥装置へ伝動するときと、整地装置へ伝動するときで異なる姿勢とし、左右の走行輪を左右の走行伝動ケースへ取り付ける向きを変えると、左右の走行輪同士の左右間隔が変更される構成とする。【選択図】図10