PURPOSE: To provide a revetment structure capable of being simply executed at a low cost, capable of shortening the construction period, and having high durability against the corrosion by sea water when it is completed.

CONSTITUTION: A concrete structure has many buoyancy chambers 4, connecting holes 5 are formed on the bottom plates of the chambers located on side sections other than the buoyancy chambers 4, and sea water is filled in the chambers having the connecting holes 5 to the same water level as the sea surface. A proper quantity of water is filled in the buoyancy chambers 4, the concrete structure is floated in the water at the balanced state in the floating attitude, and it is towed to a prescribed position. The water injection into the buoyancy chambers 4 is adjusted at the prescribed position, and the concrete structure is sunk on the sea bottom. Piles 1 are driven into the connecting holes 5, and finally underwater inseparable concrete mixed with an underwater inseparable admixture is placed and fixed in the gaps between the connecting holes 5 and the piles 1.