An information processing device includes an image acquirer that acquires a shot image of a user, a registered user information holder that holds face identification data of a registered user, and a face authentication section that detects a face image of a registered user existing in the shot image by using face identification data held in the registered user information holder. The information processing device further includes an information processing section that executes information processing based on a detection result by the face authentication section, and a face identification data registration section that updates the face identification data based on a face image extracted from a shot image of a user at predetermined timings. The face identification data registration section determines whether or not to update the face identification data with a condition corresponding to a situation in which the timing is generated.