PROBLEM TO BE SOLVED: To provide a high-quality hydroxyapatite in which protein content, unburned carbon content, etc. are extremely small, and a hydroxyapatite production method capable of mass-producing the hydroxyapatite by a simple process. SOLUTION: A firing step of firing a bone material derived from livestock at a temperature of 600 ° C. or higher and 900 ° C. or lower, and a powder having a 50% cumulative volume particle diameter (D50) of 0.8% or more and 100 μm or less of the bone material after firing. And a pulverizing step of pulverizing so as to obtain a hydroxyapatite. The livestock-derived bone raw material is a livestock-derived steamed bone meal, a livestock-derived burned bone meal, a livestock-derived bone ash, a livestock-derived raw bone, or a processed product thereof, and the firing is performed under an oxygen-containing atmosphere. Aspects and the like are preferable. [Selection diagram] None【課題】タンパク質分及び未燃炭素分等の残留が極めて少なく、高品質なヒドロキシアパタイト、及び前記ヒドロキシアパタイトを簡易な工程により大量生産が可能であるヒドロキシアパタイトの製造方法の提供。【解決手段】家畜由来の骨原料を６００℃以上９００℃以下の温度で焼成する焼成工程と、焼成後の前記骨原料を５０％累積体積粒径（Ｄ５０）が０．８μｍ以上１００μｍ以下の粉末となるように粉砕する粉砕工程と、を含むヒドロキシアパタイトの製造方法である。前記家畜由来の骨原料が、家畜由来の蒸製骨粉、家畜由来の焼成骨粉、家畜由来の骨灰、家畜由来の生骨、又はこれらの処理物である態様、前記焼成が酸素含有雰囲気下で行われる態様などが好ましい。【選択図】なし
