PROBLEM TO BE SOLVED: To accurately perform edge shifting for aligning one edge in the width direction of a seedling tray 21 with a planting mechanism 19 by a simple constitution.SOLUTION: The edge shifting of the seedling tray 21 is started by connection of power transmission of a planting clutch mechanism 24 and is completed by disconnection of power transmission of the planting clutch mechanism 24 by the operation of an edge shift switch 31 attached to the seedling stand frame 27 of the seedling tray.【課題】苗載台２１の幅方向の一方の端を植付け機構１９に位置合わせする端寄せを，簡単な構成で正確に行う。【解決手段】前記苗載台２１の端寄せを，植付けクラッチ機構２４の動力伝達入りにて開始し，前記苗載台の苗台フレーム２７に取付けた端寄せスイッチ３１の作動にて前記植付けクラッチ機構２４を動力伝達切りにして終了する。【選択図】図４
