An RFID tag includes an inlet (20), an inlet attachment portion (10), and a ring-shaped mount portion (30). The inlet includes a substrate (21), an antenna (22) formed on the substrate, and a circuit chip (23) connected to the antenna. The inlet is attached to the inlet attachment portion. The ring-shaped mount portion is connected to the inlet attachment portion and is mounted on an object. The inlet is off-centered with respect to the inlet attachment portion so as to locate an upper edge of the inlet above an upper end of the ring-shaped mount portion.
