PROBLEM TO BE SOLVED: To provide a seedling transplanter capable of smoothly planting seedlings.SOLUTION: A seedling transplanter includes a traveling vehicle body 2, a steering member 34 to steer the traveling vehicle body 2, a planting apparatus 4 that is provided in connection with a rear side of the traveling vehicle body 2 and plants seedlings to a field, a horizontally turning mechanism 70 that turns the planting apparatus in a horizontal direction, a steer detecting part 102 that detects the steering direction of the steering member, and a controller 73 that operates the horizontally turning mechanism 70 and turns the planting apparatus 4 in the horizontal direction based on the steering direction from the steer detecting part 102.COPYRIGHT: (C)2013,JPO&INPIT【課題】滑らかに苗を植え付け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と、走行車体2を操舵する操舵部材34と、走行車体2の後側に連結して設けられ、苗を圃場に植え付ける植え付け装置4と、水平な方向に前記植え付け装置を回動する水平方向回動機構70と、操舵部材の操舵方向を検知する操舵検知部102と、操舵検知部102からの操舵方向に基づいて、水平方向回動機構70を動作させ、植え付け装置4を水平な方向に回動する制御部73を備えた、苗移植機である。【選択図】図9