To ensure insulation without increasing an insulating distance nor involving a molding process as well as to achieve the downsizing and easy production of an insulating structure, an insulating structure is provided for a shielded connector characterized in that a terminal is pressured onto conductors of an insulated core wire, so that the terminal is inserted within a terminal accommodating chamber; and that a shielding braid covering the insulated core wire is connected to a metallic shell inserted within and covering the terminal accommodating chamber. An annular insulator is fitted over the outer circumference of the insulated core wire between the terminal and the shielding braid. It is preferred that the insulator be made of an elastic material, and not only have the inner circumference thereof brought into intimate contact with the outer circumference of the insulated core wire, but also have the outer circumference thereof brought into intimate contact with the inner circumference of the terminal accommodating chamber.