To improve the efficient practical use and reliability of lending business by recovering and discriminating a key surely and safely in rent-a-car lending business.

When a return is received, the number of a key can be read and discriminated automatically by setting the key returned by a user into a return port, and the key is recovered automatically. Consequently, when a key tag is inserted between a pedestal 101 and a holding plate 102, the bar code of the key tag on the pedestal 101 is read by a reader 105, and the key tag is dropped by a dropping device 109 arranged at the center of the holding plate 102 during the movement of the pedestal 101 and the holding plate 102 by shifting the pedestal 101 and the holding plate 102 to the right side by a rail 108 and a belt 7 by a driving device 106. Accordingly, the key is recovered automatically while the number of the key can be discriminated.