There are provided a multi-layered holographic recording medium having a significantly improved recording density and data transfer rate, a manufacturing method thereof, a multi-layered holographic recording/reproducing method, a multi-layered holographic memory reproducing device, and a multi-layered holographic recording/reproducing device. The multi-layered holographic recording medium (10) for reproducing information by the multi-layered holographic memory reproducing device (36) includes a plurality of holographic recording layers (14A, 14B, 14C, ) which are layered one on another. During recording, a common reference light is applied to the holographic recording layers and the incident angle of an object light is modulated for each of the holographic recording layers. During reproduction, a reproduction laser beam of the same condition as the reference light during recording is applied so that from each of the holographic recording layers (14A, 14B, ), diffraction light is generated simultaneously in the same direction as the incident direction of the object light during recording.
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