A choke structure including: an inside surface conductive pattern formed in the surrounding of a through hole on the surface of a dielectric substrate opposing a waveguide substrate; an outside surface conductive pattern formed in the surrounding of the inside surface conductive pattern positioned apart therefrom; a conductor opening provided between the inside surface conductive pattern and the outside surface conductive pattern and in which a dielectric member is exposed; a dielectric transmission path short-circuited at an end that is formed by an inner layer conductor, which is provided away from the conductor opening by a predetermined distance in the layer-stacking direction of the dielectric substrate; and a plurality of penetrating conductors, which connect the inner layer conductor to the inside surface conductive pattern.