PURPOSE: To place rubble with good accuracy by a method in which rubble is charged through a rubble tube whose upper end is connected with a working ship under hung down state and the lower end is set on the seabed.

CONSTITUTION: A rubble guide tube 2 having openings on its both ends is provided with a crane 3 whose upper end is hung down from a working ship and the lower end is set on the seabed when charging rubble, which serves to vertically move the guide tube 2. The tube 2 is also hung down from the working ship 1 in such a way as to enable it to turn around the upper supporting point. A rope 4 is laid between the lower end of the tube 2 and the ship 1 in such a way as to enable the tube 2 to turn around the upper supporting point. The rubble can thus be charged near the seabed and the muddling of sea water caused by soil adhered to the rubble can also be reduced.