PURPOSE: To improve the crosstalk characteristics of a coaxial code collected and wired in the frame of a high frequency device by adhering a flat type copper braided wire external coat enabled to be connected like a tube by a metallic zipper to the periphery of the external coat of the coaxial code.

CONSTITUTION: The flat type copper braided wire 11 is shaped like a band of which length is almost equal to the length of the coaxial code 5 to be shielded and width is almost equal to the periphery of the coaxial code and is formed as a flat type copper braided wire external coat 10 enabled to be connected like a tube by fitting the metallic zipper 12. The zipper 12 is opened to make the external 10 flat, the external coat 10 is abutted along the external coat of the coaxial code 5 and then the zipper 12 is zippered. Thus, the external coat 10 is adhered to the coaxial code 5, respective coaxial connectors 1 are arranged on positions to be connected in the frame of the high frequency device and then lead terminals 13 are connected to the earth bars of the frame. When the coaxial code is connected to an external conductor, its shielding effect is improved and the crosstalk characteristics are improved.