An IC tag label (10, 204) comprising: an IC chip; a communication antenna element having a first end and a second end, the first end being electrically connected to the IC chip, the communication antenna including a planar coil extending on a first surface and having a shape suitable for positioning on a bottle mouth; and a bridge wiring electrically connecting the second end to the IC chip; and a wire break detection circuit including a detection element (142d, 142e) located outside the planar coil in plan view perpendicular to the first surface, and electrically connected to the IC chip, the detection element having a shape suitable for positioning on the bottle neck, wherein the communication antenna element has an air core section which includes a center of the planar coil, one of the bridge wiring and the wire break detection circuit includes a single wire, the single wire is located on an opposed region on a second surface which is opposed to the first surface when the bridge wiring includes the single wire, the single wire is located on one of the first surface and the opposed region when the wire break detection circuit includes the single wire, and A) the single wire includes a plurality of bent sections (141c1) and having a folded line shape which traverses the air core section a plurality of times in plan view perpendicular to the first surface, or B) the single wire has a spiral shape overlapped with the air core section in plan view perpendicular to the first surface. an IC chip; a communication antenna element having a first end and a second end, the first end being electrically connected to the IC chip, the communication antenna including a planar coil extending on a first surface and having a shape suitable for positioning on a bottle mouth; and a bridge wiring electrically connecting the second end to the IC chip; and a wire break detection circuit including a detection element (142d, 142e) located outside the planar coil in plan view perpendicular to the first surface, and electrically connected to the IC chip, the detection element having a shape suitable for positioning on the bottle neck, wherein the communication antenna element has an air core section which includes a center of the planar coil, one of the bridge wiring and the wire break detection circuit includes a single wire, the single wire is located on an opposed region on a second surface which is opposed to the first surface when the bridge wiring includes the single wire, the single wire is located on one of the first surface and the opposed region when the wire break detection circuit includes the single wire, and A) the single wire includes a plurality of bent sections (141c1) and having a folded line shape which traverses the air core section a plurality of times in plan view perpendicular to the first surface, or B) the single wire has a spiral shape overlapped with the air core section in plan view perpendicular to the first surface. A) the single wire includes a plurality of bent sections (141c1) and having a folded line shape which traverses the air core section a plurality of times in plan view perpendicular to the first surface, or B) the single wire has a spiral shape overlapped with the air core section in plan view perpendicular to the first surface.