A registration data acquirer determines a position of a registration data acquisition region from an image captured by a detection camera based on an external shape of a tablet and a position of a printing pattern printed on the tablet. A collation data acquirer determines a position of a collation data acquisition region from an image captured by an inspection camera based on the external shape of the tablet and the position of the printing pattern. A verifier compares registration data with collation data in the same tablet, to thereby verify that reliability of the registration data is equal to or larger than a predetermined criterion value.
