The present invention discloses means and methods for providing trans-Douglas endoscopic surgical procedures in the pelvis and in other body portions, and especially gynecological, cardiological, urological, vascular, neurological or surgical operations; said method comprising steps of opening the Pouch of Douglas; inserting an U-shapeable or S-shaped endoscopic surgical device into the vagina in parallel to the blood vessels; introducing the distal end into the abdominal cavity; U-shaping or S-shaping the tubular assembly; and carrying out an operation in the pelvis.