An electricity feeding device for a vehicle slide door includes a flexible conductive portion having a curved portion, with the curved portion being moved in conjunction with movement of the slide door for opening and closing the opening area formed in the side wall of the vehicle body. The flexible conductive portion includes a wire electrically connecting components in the slide door and the vehicle body, an insulating member covering the wire, a belt made of metal such as steel that extends along the insulating member with the insulating member being mounted on the belt, and a cover member covering the belt and the insulating member in such a manner that the cover member is movable relative to the belt and the insulating member, and the belt is movable relative to the insulating member.