A disc cartridge loading device for a recording medium utilizes a cartridge holder for holding a disc cartridge used as a recording medium for information signals. The cartridge holder performs a movement operation when moved from a first position permitting insertion/withdrawal of the disc cartridge to a second position for loading the disc cartridge into a loading portion of a recording/reproducing apparatus. The loading device further comprises a vertical movement operation mechanism including a vertical movement operation plate for allowing vertical movement of the cartridge holder with respect to the loading portion.
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