A structural body includes: a first conductor and a second conductor of which at least portions are opposite to each other; a third conductor, interposed between the first conductor and the second conductor, of which at least a portion is opposite to the first conductor and the second conductor, and has a first opening; an interconnect provided in the inside of the first opening; and a conductor via which is electrically connected to the first conductor and the second conductor and is electrically insulated from the third conductor, wherein the interconnect is opposite to the first conductor and the second conductor, one end thereof being electrically connected to the third conductor at an edge of the first opening and an other end thereof being formed as an open end.