To provide a paddy field working vehicle in which upper and lower displacement of front wheels is detected, and lifting/lowering control and horizontal control of a planting unit are performed according to each change, and thereby the planting accuracy is improved further.SOLUTION: A paddy field working vehicle includes: a traveling unit 2 supported by front wheels 6, 6 and rear wheels 7, 7 a planting unit 20 supported to the traveling unit 2 in a lifting/lowering manner a lifting/lowering control unit 60a for controlling the lifting/lowering of the planting unit 20 a float sensor 63 provided in a float 27 of the planting unit 20, and detecting the lifting/lowering displacement of the float 27 a suspension sensor 61 for detecting the stretching displacement of a suspension mechanism provided at the front wheels 6, 6 and a front-rear inclination sensor 62 provided at the traveling unit 2, and detecting the longitudinal inclination of a machine body. A memory unit 66 of the lifting/lowering control unit 60a stores a gain map according to a relationship between the detection value from the front-rear inclination sensor 62 and the detection value of the suspension sensor 61. The lifting/lowering control unit 60a acquires a control amount based on the gain g obtained from the gain map, and performs the lifting/lowering control.SELECTED DRAWING: Figure 4【課題】前輪の上下変位を検知して、それぞれの変化に応じて、植付部の昇降制御と水平制御を行い、植付精度をさらに向上できるようにする。【解決手段】前輪6・6と後輪7・7で支持される走行部2と、走行部2に昇降可能に支持される植付部20と、植付部20の昇降を制御する昇降制御部60aと、植付部20のフロート27に設けられてフロート27の昇降変位を検出するフロートセンサ63と、前輪6・6に設けられるサスペンション機構の伸縮変位を検出するサスペンションセンサ61と、走行部2に設けられ、機体の前後方向の傾斜を検出する前後傾斜センサ62とを備え、前記昇降制御部60aの記憶部66には、前記前後傾斜センサ62からの検出値とサスペンションセンサ61の検出値との関係に応じたゲインマップを記憶し、前記昇降制御部60aは、前記ゲインマップから得られるゲインgを基に制御量を取得し、昇降制御を行う。【選択図】図4
