PROBLEM TO BE SOLVED: To provide a farm working machinery having improved working efficiency. SOLUTION: The farm working machinery 1 has a machine frame 2 and a furrow-forming device 21 placed at a side of the frame and forming a sowing furrow on a field surface A. A sowing device 31 to sow a seed W on a sowing furrow formed by the furrow-forming device 21 is placed at a side of the machine frame 2. A grounding roller 41 rotating in a prescribed direction in a state brought into contact with the field surface A is attached to the machine frame 2 in a rotatable manner. The grounding roller 41 is provided with a soil-covering and soil-packing roller to cover the field A with soil and press the soil at the back of the furrow-forming device 21. The diameter of the grounding roller 41 is larger than that of the soil-covering and soil-packing roller. The machine is further provided with a draining groove forming roller 51 to form a draining groove on the field surface A at a position behind and between the adjacent furrow-forming devices 21.
