PROBLEM TO BE SOLVED: To provide an organic-inorganic composite material in which hydroxyapatite is composited, which can easily improve mechanical strength, flexibility and water resistance of a molded product. SOLUTION: An organic-inorganic composite material comprises a water-soluble polyester resin (A) having at least one of a carboxyl group and a metal sulfonate group, and a hydroxyapatite composited with the water-soluble polyester resin (A). Including. [Selection diagram] None
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