To process both a card-like noncontact recording medium (noncontact ticket) and a coin-like noncontact recording medium (token) with a single antenna.

In this noncontact recording medium processing device capable of processing both the card-like noncontact recording medium and the coin-like noncontact recording medium, the slit-like inlet of the coin-like noncontact recording medium is provided near the outside of a loop antenna so that the slit-like inlet has a specified angle relative to the center position of the loop antenna to prevent the longitudinal direction of the slit-like inlet from intersecting the center position of the loop antenna.