PROBLEM TO BE SOLVED: To prevent sudden stop operation in a high centroid state in which a work machine is lifted.SOLUTION: A sulky rice transplanter 1 includes: a travel machine body 2； and a planting work machine 4 connected at a rear part of the travel machine body 2 to be lifted/lowered. The sulky rice transplanter further includes: a rotation sensor 28 arranged in a rear wheel power transmission shaft 23 of the travel machine body 2 and detecting rotation of the rear wheel power transmission shaft 23； a lifting/lowering height sensor 46 detecting a lifting/lowering height of the planting work machine 4； and a control section 45 inputting a detection signal from at least the rotation sensor 28 and the lifting/lowering height sensor 46. The control section 45 calculates a travel speed of the travel machine body 2 based on the detection signal of the rotation sensor 28 and performs warning on sudden stop operation of the travel machine body 2 when the planting work machine 4 is at a higher position than a predetermined lifting/lowering height and the travel machine body 2 travels at a speed equal to or higher than a predetermined travel speed.SELECTED DRAWING: Figure 7【課題】作業機を上昇させた高重心状態における急停止操作を防止する。【解決手段】走行機体２と、該走行機体２の後部に昇降自在に連結される植付作業機４と、を備える乗用型田植機１であって、走行機体２の後輪動力伝動軸２３に設けられ、該後輪動力伝動軸２３の回転を検出する回転センサ２８と、植付作業機４の昇降高さを検出する昇降高さセンサ４６と、少なくとも回転センサ２８及び昇降高さセンサ４６から検出信号を入力する制御部４５と、を備え、該制御部４５は、回転センサ２８の検出信号に基づいて走行機体２の走行速度を算出するとともに、植付作業機４が所定の昇降高さよりも高い位置にあり、且つ、走行機体２が所定の走行速度以上で走行している場合に、走行機体２の急停止操作に関する警報を行う。【選択図】図７
