A control method of a personal authentication apparatus and a personal authentication apparatus stores a piece of authentication information of a predetermined user. The method and apparatus estimates an emotion felt by a target user, based on a physical quantity acquired by a sensor, generates identification information that identifies an object that causes the target user to feel the estimated emotion, based on the physical quantity acquired by the sensor or presentation information presented by a presenter, and determines whether the target user is the predetermined user based on the estimated emotion and the generated identification information and the piece of authentication information of the predetermined user.