A display label, having a display section on a surface thereof and an adhesive surface on a back surface thereof, and an IC tag, provided with an antenna coil and an IC chip so as to transmit information through non-contact communication, are prepared. After writing information on the IC chip, reading test is applied, so as to separate non-defective ID tags and defective ID tags. After printing addition display on the surface of the display label, a non-defective ID tag is adhered on an adhesive surface thereof, so as to form an RFID label. Then the RFID label is affixed to an object-to-affix such as a container. An affixing method of an RFID label and its affixing method are provided, wherein an ID tag is less likely to be damaged, since the ID tag is not adhered on a display label while printing additional display.