Abstract: An improved card reader structure with an axial-rotate joint is mainly comprised of a body assembled by an upper and a lower shell disposed therein with a converting circuit mounted by a insertion slot projecting from the longitudinal side of the body and connecting to an USB plug mounted on an axle housing housed to the opening at the front end of the body to enable the card reader to be plugged into the computer main board to eliminate the trouble of using the connecting cable and to provide the possibilities of replacing different flash cards due to the design of the insertion slot and of permitting the body to do axle-rotation in different angles so as to increase the practical value of the product.