To provide a radio tag communication device, a radio tag, and a radio tag communication system for quickly and easily acquiring data from a desired radio tag circuit element among a plurality of radio tag circuit elements created on different dates.

This radio tag communication device is provided with a plurality of radio circuit elements To, each of which has an IC circuit part 150 storing information and an antenna 151 receiving/transmitting information and stores an UID, creation date information and data body in the IC circuit part 150, an antenna 306R transmitting/receiving information via radio communication, and a control circuit 311 acquiring the UID and the creation date information stored in the IC circuit parts 150 of a plurality of radio tag circuit elements To via the antenna 306R by using a query signal, and based on the acquired creation date information and UID, specifying the target radio tag circuit element To of the data body.