PROBLEM TO BE SOLVED: To provide an RFID animal ear tag which reduces influence by a living body such as an ear and a face of an animal to be managed or interference between antennas to each other even when two RFID tags of a dipole antenna are used for an antenna element.SOLUTION: The RFID animal ear tag includes: a tag part having a hole part a first dipole antenna provided in the tag part and in which a first IC chip is electrically connected to a first power supply part through a first matching line and a second dipole antenna causing the first power supply part to face to a second power supply part, provided in the tag part, and in which a second IC chip is electrically connected to the second power supply part through a second matching line. A first angle formed of the direction directed from the hole part to the first power supply part, and the inclination of the first dipole antenna and the second angle formed of the direction directed from the hole part to the second power supply part, and the inclination of the second dipole antenna are different and the interference of the first dipole antenna and the second dipole antenna are reduced.
