T he aim targets of this works is study the effect of coconut kernel powder with different ratio 5,10 and 15% on chemical, biological changes of rats induced obesity. Chemical composition, phenols, flavonoids, DPPH radical assay and fatty acids of coconut powder were studied. In addition, biological parameters were studied. Results showed that it could be concluded that coconut kernel powder is considered as a good source of oil, crude fiber, ash content, protein carbohydrates, total calories and has an antioxidant properties. Also it is a rich source of medium-chain triglyceride, mainly lauric acid, with approximately have the amount of fatty acids. Total saturated fatty acids represent 94.59%. Biological evaluation revealed that obesity rats fed on diet supplemented by coconut powder showed significant decrease (P ≤ 0.05) of body weight, total lipids, cholesterol, triglyceride, LDLC and VLDLC. In addition, diet containing coconut powder significant decreased (P≤ 0.05) in liver enzymes (AST, ALT and LAP) and kidney functions (urea, uric acid and creatinine) of obesity rats. Moreover, increased both serum protein and albumin and lowering blood glucose. Were observed.