1. A photographic subject authenticating device comprising photographing means for photographing a photographic subject, and performing authentication processing for authenticating the photographic subject based on a photographic image provided by photographing the photographic subject by the photographing means; the photographic subject authenticating device further comprising: input means for receiving an input using the photographic subject; and control means for controlling operations of the input means; wherein the control means is constructed so as to execute: authentication repeating processing for also repeatedly executing the authentication processing after it is judged as in conformity by said authentication processing; repeating stoppage instruction receiving processing for receiving repeating stoppage instructions for stopping the repetition of said authentication processing by said input means; true and false judgment processing for comparing the received repeating stoppage instructions with normal instructions registered in advance, and making true and false judgments; and repeating stoppage processing for stopping said authentication repeating processing when the judging result of the true and false judgment processing is true.