PROBLEM TO BE SOLVED: To provide a farming machine capable of reducing burden on an operator.SOLUTION: A farming machine 1 is equipped with a machine body 2 which is connected to a tractor. In the machine body 2, a movable body 3 is provided in a vertically movable manner. The movable body 3 is provided with a ground wheel 4 in a rotatable manner. In between the machine body 2 and the movable body 3, an expandable body 6 is installed. The farming machine 1 is equipped with a motor 7 which expands the expandable body 6 and a gas spring 8 which is energization means for assisting the expanding motion of the expandable body 6 by the motor 7.