To provide a rental management device capable of significantly improving work efficiency of rental work for keys or the like and providing an instantaneous grasp of rental situations of the keys or the like.

In an information reader 26, since antennas are provided respectively in regard to a plurality of tag housing inlets 46, one-to-one correspondences are provided between RFID tags 28 and the antennas in a state of the RFID tags 28 housed in the tag housing inlets 46. Consequently, by grasping a correspondence relationship between the antenna and the tag housing inlet 46, one can instantaneously grasp which tag housing inlet 46 is housing the RFID tag 28 on the basis of information read by the antenna from the RFID tag 28. By lighting a predetermined lamp 52, a position of the specified RFID tag 28 can be indicated.