Hydroxyapatite (HA), a calcium hydroxyphosphate was prepared via precipitation method and used as a catalyst in a Fenton like process for methyl violet (MV) dye degradation. This study is aimed to evaluate the effect of hydrogen peroxide concentration, HA dose, initial pH, temperature and MV concentration on the catalyst performance to find out the optimum conditions leading to maximum efficiency of the Fenton process. The results showed that MV dye with a concentration of 20 mg L-1 can be removed within just 10 minutes at the optimal conditions of 36 mmol L–1 H2O2 and 2.5 g L–1 HA at pH of 6.65 and T = 48 °C). The experimental outcome of this study also demonstrates that HA displayed a good recyclability over three cycles; while the use of scavenger highlighted that the hydroxyl radical HO• was the main active species for MV degradation. The catalytic tests result of MV dye degradation were analyzed by the first-order, second-order and Benhnajady-Modirshahla-Ghanbery (BMG) kinetic models, those showing that the Fenton like reaction follows the first-order and BMG models. The activation energy of the reaction and the values of thermodynamic parameters such as standard enthalpy (ΔH*0), entropy (ΔS*0) and Gibbs free energy (ΔG*0) were also evaluated. Those results revealed that the degradation of MV over the as-synthesized material is an endothermic and non-spontaneous process.