1. A method for recognizing a fingerprint dually in an apparatus for recognizing the fingerprint, the method comprising: disposing an optical sensor unit and a semiconductor sensor unit such that they are adjacent to each other; driving the optical sensor unit to obtain a first fingerprint image of a user's fingerprint according to an optical fingerprint recognizing method; obtaining a second fingerprint image of the fingerprint using the semiconductor sensor unit; generating first fingerprint data, which is minutiae data, from the first fingerprint image and generating second fingerprint data, which is minutiae data, from the second fingerprint image; searching for data that matches with the first fingerprint data and the second fingerprint data from of registration fingerprint data registered in advance, to perform authentication; and when authentication for the first fingerprint data and authentication for the second fingerprint data succeed, judging authentication for the user's fingerprint has finally succeeded.