A storage device for automating storage of cases for supply of a board work line, the storage device comprising: an acquisition section configured to, when a case accommodating multiple accommodatable objects is loaded into a storage container, perform wireless communication with both a first wireless tag attached to the case and second wireless tags by using a wireless device provided at an entrance of the storage container to acquire specific information for specifying the case memorized in the first wireless tag and identification information (ID21-ID26) for identifying each of the multiple accommodatable objects memorized in the second wireless tags, wherein each second wireless tag memorises the identification information of a corresponding accommodatable object of the multiple accommodatable objects to which it is attached, wherein the case has plural accommodation regions (A11-A16, A21-A24) capable of accommodating the multiple accommodatable objects, and a management section configured to associate the specific information and the identification information acquired by the acquisition section with each other to manage a correspondence relationship between the specific information and the identification information, wherein the correspondence relationship associates region information indicating one of the accommodation regions (A11-A16) with accommodation of accommodatable objects identified by the identification information (ID21-ID26), wherein the management section informs of a difference between the multiple accommodatable objects accommodated in the case based on the identification information acquired by the acquisition section before the case is unloaded from the storage container and the identification information acquired by the acquisition section when the case is loaded into the storage container again. an acquisition section configured to, when a case accommodating multiple accommodatable objects is loaded into a storage container, perform wireless communication with both a first wireless tag attached to the case and second wireless tags by using a wireless device provided at an entrance of the storage container to acquire specific information for specifying the case memorized in the first wireless tag and identification information (ID21-ID26) for identifying each of the multiple accommodatable objects memorized in the second wireless tags, wherein each second wireless tag memorises the identification information of a corresponding accommodatable object of the multiple accommodatable objects to which it is attached, wherein the case has plural accommodation regions (A11-A16, A21-A24) capable of accommodating the multiple accommodatable objects, and a management section configured to associate the specific information and the identification information acquired by the acquisition section with each other to manage a correspondence relationship between the specific information and the identification information, wherein the correspondence relationship associates region information indicating one of the accommodation regions (A11-A16) with accommodation of accommodatable objects identified by the identification information (ID21-ID26), wherein the management section informs of a difference between the multiple accommodatable objects accommodated in the case based on the identification information acquired by the acquisition section before the case is unloaded from the storage container and the identification information acquired by the acquisition section when the case is loaded into the storage container again.