A work vehicle comprising: - an implement connected to a machine body and capable of carrying out a ground work; - an actuator provided in the machine body and capable of changing a position of the implement relative to the machine body; - a machine body side sensor provided in the machine body and capable of detecting a posture change of the machine body; - an implement side sensor provided in the implement and capable of detecting a position of the implement relative to the ground surface which includes height of the implement and tilt of the implement; - an implement side control device provided in the implement and configured to obtain the position of the implement relative to the ground surface from the implement side sensor; - a machine body side control device provided in the machine body and configured to control the actuator so that the positon of the implement relative to the ground surface may agree to a target position; - a displacement calculation section which is configured to calculate a displacement amount of the position of the implement, which is calculated by the implement side sensor via the implement side control device, from the target position; and - the machine body side control device being configured to control the actuator based on information on the posture change of the machine body obtained from the machine body side sensor and information on the position of the implement relative to the ground surface obtained from the implement side sensor, and to adjust the position of the implement in accordance with the displacement amount by controlling the actuator in such a manner as to resolve the level difference in the height direction and the tilt difference between the ground surface with which the machine body is placed in contact and the ground surface immediately below the implement. - an implement connected to a machine body and capable of carrying out a ground work; - an actuator provided in the machine body and capable of changing a position of the implement relative to the machine body; - a machine body side sensor provided in the machine body and capable of detecting a posture change of the machine body; - an implement side sensor provided in the implement and capable of detecting a position of the implement relative to the ground surface which includes height of the implement and tilt of the implement; - an implement side control device provided in the implement and configured to obtain the position of the implement relative to the ground surface from the implement side sensor; - a machine body side control device provided in the machine body and configured to control the actuator so that the positon of the implement relative to the ground surface may agree to a target position; - a displacement calculation section which is configured to calculate a displacement amount of the position of the implement, which is calculated by the implement side sensor via the implement side control device, from the target position; and - the machine body side control device being configured to control the actuator based on information on the posture change of the machine body obtained from the machine body side sensor and information on the position of the implement relative to the ground surface obtained from the implement side sensor, and to adjust the position of the implement in accordance with the displacement amount by controlling the actuator in such a manner as to resolve the level difference in the height direction and the tilt difference between the ground surface with which the machine body is placed in contact and the ground surface immediately below the implement.