Textile industry produces large quantities of wastewater which represent a high health hazard. The main purpose of this research is to investigate and evaluate the ability of using hydroxyapatite as adsorbents in the treatment of textile dye waste near neutral pH values, which gives another benefit of reusing the treated water without further pH adjustment. In the present study, hydroxyapatite from fish scales was used as an adsorbent for HB blue dye. Hydroxyapatite was characterized using SEM, EDX and FTIR. Adsorption kinetics were modeled using both pseudo-first-order model and pseudo-second-order model. Equilibrium isotherm are studied and Langmuir model (i.e. Freundlich, Langmuir, and BET). The Langmuir adsorption model is better describing the adsorption with correlation coefficients for the HB blue dye with R2 equals 1. To achieve a removal efficiency of 85 % in aqueous solution, the optimum adsorbent dose required is 20 mg.