Abstract: A motor vehicle door of the type having a door hollow (4) disposed between an inside wall and an outside wall (2, 3), electrical lines (11; 13; 15; 17), linkages (21) and/or Bowden cables (22) (altogether identified as supply lines below) being arranged in and with the door hollow. To accomplish that a forcible opening of the door from the outside by inserting tools, etc. into the door hollow is almost impossible, the supply lines (11; 13; 15; 17; 21; 22) are arranged on or in a support element (6; 20; 23) such that they are at least partially covered toward the outside wall (3) of the vehicle door (1; 100).