In this study, chicken bone was used as starting material for hydroxyapatite (HAp) synthesis. Chicken bone was calcined in electric furnace at 1000°C for 5 hours in order to obtain calcium oxide. Calcium oxide was reacted with aquadest to form calcium dioxide which was used as calcium precursor. Calcium dioxide was reacted with phosphoric acid which was used as phosphorus precursor. This reaction was conducted at pH 10 and reaction temperature was 40°C. The obtained results of this reaction were calcined at 500°C and 900°C for 2 hours and 6 hours. Then it was characterized by using FTIR, XRD and SEM. The increasing of temperature and time of calcination lead to low carbonate content and good morphology. Different result occurs in particle size which increased with increasing temperature and time of calcination. HAp that synthesized from this study had low purity. Best result was obtained in calcination at temperature 900°C and in 6 hours long where crystal size and crystallinity degree from this sample were 63.021 nm and 87.30% respectively.

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