Abstract: A circuit body (4) is received in an S-shaped configuration in a receiver (3) in a door. A protector (5) with a connector (6) is outwardly slidably provided inside the receiver (3). A circuit body fixing member (12) is provided at a front portion of the receiver (3), and a guide roller (15) is provided at a rear portion of the protector. The circuit body is wired from the fixing member (12) via the guide roller (15) into the protector and to the connector (6).Alternatively, a circuit body fixing member (12) and a guide roller (23) may be provided at a front portion of a receiver (10), the latter in such a manner as to be positioned inside the protector 27. The circuit body is held down by the guide roller (23) inside the protector.The circuit body is smoothly expanded and contracted with the opening and closing of the door.