To provide a seedling transplanter capable of further improving the accuracy of automatic straight running.SOLUTION: The traveling vehicle body (2) having the steered wheels (4) steered by the steering device (110), the seedling planting part (50) connected upwardly and downwardly to the rear part of the traveling vehicle body (2) , A position information acquisition device (120) for acquiring position information of the traveling vehicle body (2), a tilt detection portion (180) for detecting a tilt in the longitudinal direction of the traveling vehicle body (2), and a position information acquisition device And a control unit (150) for controlling the steering device (110) on the basis of the acquired position information to perform straight forward support for supporting the automotive straight running of the traveling vehicle body (2). When the inclination detector (180) detects that the forward raising posture of the traveling vehicle body (2) is equal to or greater than a predetermined angle during the execution of the straight advancing support, the control unit (150) controls the seedling planting unit At least a part of it is lowered to suppress the inclination of the traveling vehicle body (2).(FIG.【課題】自動直進走行の精度をより高めることのできる苗移植機を提供すること。【解決手段】操舵装置(110)により操舵される転舵輪(4)を備えた走行車体(2)と、走行車体(2)の後部に昇降自在に連結される苗植付部(50)と、走行車体(2)の位置情報を取得する位置情報取得装置(120)と、走行車体(2)の前後方向の傾きを検出する傾き検出部(180)と、位置情報取得装置(120)が取得した位置情報に基づき操舵装置(110)を制御して走行車体(2)の自動直進走行を支援する直進サポートを行う制御部(150)とを備える。制御部(150)は、直進サポートを実行中に、走行車体(2)の前上がり姿勢が所定角度以上であることを傾き検出部(180)が検出した場合、苗植付部(50)の少なくとも一部を下降させて、走行車体(2)の傾きを抑制する。【選択図】図9
