A stored information processing device for external storages, comprises a plurality of connecting portions for connecting a plurality of external storages in a detachable manner, a stored information reading portion capable of reading stored information of the external storage connected to the connecting portion, a display portion capable of displaying the stored information of the external storage read by the stored information reading portion, a detection portion for detecting a connection and/or disconnection of the external storage with respect to any one of the connecting portions of the external storage, a discrimination portion for discriminating whether, when a connection and/or disconnection of the first external storage with respect to any one of the connecting portions, a second external storage is connected to the other connecting portion, and a controller for determining whether the stored information of the first and/or second external storage is displayed on the display portion depending on a discrimination result.