An RFID tag installing structure for installing a microminiaturized RFID tag
having
a cylindrical antenna coil to a conductive member, an RFID installing method, and
communication method are disclosed. An RFID tag (1) having a cylindrical
antenna coil (2) and shaped into a rod is characterized in that the axial
direction of the RFID tag (1) is parallel to the installation surface composed
of the bottom surface (7a) of an installation groove (7) made
in a conductive member (5) and is in contact with the installation surface.