A stack type documentary storage device is disclosed. The disclosed stack type documentary storage device comprises a plurality of storage modules which can be assembled by being vertically stacked in multiple stages. Moreover, a fixing means is formed to fix a stack position of the storage modules. The fixing means comprises: a plurality of position fixing grooves; and a position fixing protrusion. Each of the storage modules comprises: a body case; a transparent door; a pair of slot type rails; a bookend; an antibiotic kit; and a humidifying kit. The present invention is to provide the stack type documentary storage device with an improved structure for books to be more conveniently stored.
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