An alignment jig holder of a manual gem grinder is provided to maintain a position of a raw ore in parallel, and to improve polishing speed by holding an alignment jig on a holder unit of each process. An alignment jig holder of a manual gem grinder comprises a holding stand(20), a rotating cylinder(10), and a balance adjusting unit(21). The holding stand is mounted to a radial direction. The holding stand is mounted with different height. The balance adjusting unit is mounted on the top of the holding stand. The balance adjusting unit includes an eccentric ball. An elevating bolt is mounted on the bottom of the holding stand. A cone-shaped recessed groove(24) is formed on the elevating bolt.
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