<；P>；PROBLEM TO BE SOLVED: To evade unstable rolling-control state at turning by steering in a tractor operation at levee side or the like of a field. <；P>；SOLUTION: The tractor implement obtained by installing an implement in a tractor body 1 has a slope sensor 3 for detecting right or left tilted angle of the body 1, a speed sensor 4 for detecting the speed of the vehicle, a steering sensor 5 for detecting steering angle of the body 1, etc. The tractor implement carries out horizontal control and parallel control of a connecting posture of the implement 2 to the body 1 based on the detection by each sensor 3, 4 or 5. When the steering sensor 5 detects a turning angle larger than a prescribed angle, the horizontal control is stopped and the parallel control is operated, and when a prescribed time passes from the detection of the turning angle smaller than the prescribed angle by the steering sensor, the control is returned to the horizontal control. <；P>；COPYRIGHT: (C)2007,JPO&INPIT
