PROBLEM TO BE SOLVED: To provide a seedling transplanter capable of reducing smashing of seedlings already planted and improving working efficiency.SOLUTION: A seedling transplanter includes: a machine 2 having a pair of right and left front wheels 3L and 3R and a pair of right and left rear wheels 4L and 4R a seedling planting device 7 arranged in a backward of the machine 2 for planting seedlings on a field a rear wheel gear case connection 210 provided in the rear part of the machine 2 and capable of turning a front and back direction as a rear wheel rolling spindle 200 a pair of right and left compression springs 230L and 230R or the like for vertically moving the pair of right and left rear wheels connected to both right and left ends of the rear wheel gear case connection 210, respectively and independently a tilt detection sensor 30 for detecting a tilt of the machine 2 in a right and left direction and a hydraulic cylinder 300 for rolling or the like for turning the rear wheel gear case connection 210 based on the detection result.COPYRIGHT: (C)2013,JPO&INPIT【課題】既に植え付けられた苗を押しつぶしたりすることを低減し作業効率を向上させることが出来る苗移植機を提供すること。【解決手段】左右一対の前輪3L、3Rと左右一対の後輪4L、4Rを有する機体2と、機体2の後方に配置され苗を圃場に植え付ける苗植付装置7と、機体2の後部に設けられた前後方向を後輪ローリング支軸200として回動可能な後輪ギヤケース連結体210と、後輪ギヤケース連結体210の左右両端に連結された左右一対の後輪をそれぞれ独立に上下動させる左右一対の圧縮バネ230L、230R等と、機体2の左右方向の傾斜を検知する傾斜検出センサー30と、その検知結果に基づいて後輪ギヤケース連結体210を回動させるローリング用油圧シリンダー300等と、を備えた苗移植機である。【選択図】図2