It comprises first traction means (8) of the bales (2) and dragging means (5a, 5b) of said first traction means (8) disposed to transport the bales (2) along an upward inclined plane (4) to a loading platform, and it is characterized in that it comprises second traction means (9) of the bales (2) configured to contact the bales (2) at ground level (13) in a advanced attack position with respect to the first traction means (8), said device (1) including dragging means (6a,6b) of said second traction means (9) disposed to lift the bales (2) from the ground (13) and transport said bales (2) until making contact with the first traction means (8).
