To enhance noise elimination characteristics by covering a board through which plural contact elements pass, a filter unit, and the terminals of a group of insulated conductors with a shielding case made of conductive material.

Plural contact elements 1 are arranged so as to pass through a board 2 on which filter units 3 composed of electrodes 3A directly contacting the contact elements 1, insulation separators 3B, and grounding electrodes 3c are formed, and the insulated conductors 5 of a cable 4 are electrically connected to one side ends 1A of the contact elements 1. In the cable 4, the outer periphery of the insulated conductors 5 are surrounded by a pressing winding 4A, and a sheath 4B, and a rubber bushing 8 is arranged on the mechanical coupling portion of the shielding case 7 of a connector and the cable 4. The board 2 is sandwiched by the front housing 7A and the buck housing 7B of the shielding case 7 from both sides and is fixed.