An information processing apparatus (10-1, 10-2) comprising: a biometric information authentication unit configured to authenticate biometric information identified from each of a plurality of captured images of an eye of a user on the basis of a plurality of reference images of the eye of the user corresponding to a plurality of different sight line directions of the eye of the user and to provide an authentication result for each of the captured images, the plurality of captured images captured for different sight line directions of the eye of the user as the sight line direction of the eye of the user changes, wherein each captured image corresponds to a different sight line direction of the eye of the user, and wherein the biometric information authentication unit performs authentication of the biometric information by comparing each of the plurality of captured images of the eye with a reference image of the eye of the user which has the same sight line direction as the captured image of the eye; an authentication result combining unit configured to combine a plurality of the authentication results provided by the biometric information authentication unit; a sight line movement pattern identification unit configured to identify a movement pattern of the sight line of the user on the basis of the plurality of captured images of the eye; and a sight line movement pattern authentication unit configured to authenticate validity of the identified movement pattern of the sight line, on the basis of a registered sight line movement pattern registered in association with the user, wherein the authentication result combining unit combines the authentication results provided by the biometric information authentication unit and an authentication result provided by the sight line movement pattern authentication unit. a biometric information authentication unit configured to authenticate biometric information identified from each of a plurality of captured images of an eye of a user on the basis of a plurality of reference images of the eye of the user corresponding to a plurality of different sight line directions of the eye of the user and to provide an authentication result for each of the captured images, the plurality of captured images captured for different sight line directions of the eye of the user as the sight line direction of the eye of the user changes, wherein each captured image corresponds to a different sight line direction of the eye of the user, and wherein the biometric information authentication unit performs authentication of the biometric information by comparing each of the plurality of captured images of the eye with a reference image of the eye of the user which has the same sight line direction as the captured image of the eye; an authentication result combining unit configured to combine a plurality of the authentication results provided by the biometric information authentication unit; a sight line movement pattern identification unit configured to identify a movement pattern of the sight line of the user on the basis of the plurality of captured images of the eye; and a sight line movement pattern authentication unit configured to authenticate validity of the identified movement pattern of the sight line, on the basis of a registered sight line movement pattern registered in association with the user, wherein the authentication result combining unit combines the authentication results provided by the biometric information authentication unit and an authentication result provided by the sight line movement pattern authentication unit.