To provide a locking device which is applied to a storage system continuously provided with a plurality of storages, which realizes the simultaneous locking/unlocking of the more storages, and which makes an electrical system centralized in only one place.

The locking device LA1 mechanically transfers a driving force, which is generated by a single driving force generating part PG1 according to an electrical signal, to a main locking mechanism LM1 of a main storage SM1 from a main transmission mechanism DM1, and mechanically transfers the driving force to a sub locking mechanism LS1 of a sub-storage SS1 through a sub transmission mechanism DS1, so that all opening/closing bodies S2 of the plurality of storages S can be simultaneously opened/closed.