The tendons of semitendinosus and biceps femoris were transposed in front of the popliteal vein in a "U" shaped loop with the purpose to impede the venous back-flow. This type of operation was used in 10 cases with the aim to treat incompetence of deep vein of the lower extremity. Following the operation, patients were under clinical observation and undertaken retrograde venographie examination. It was proved that the results after operation were satisfactory with the disapperance of symptoms and subsequent healing of ulcers.