This study was designed to determine the effect of Chromium methionine (CrMet) at different levels on growth parameters, blood constituents, immunity, and anti-oxidative properties of growing Japanese quail. A total of 150 7-day old unsexed Japanese quail chicks were randomly distributed to five dietary treatments of thirty birds to a treatment. Each treatment was replicated three times with ten birds to a replicate. Five isocaloric and isonitrogenous diets were formulated. CrMet was added to the basal diet at five different levels being 0, 200, 400, 600, and 800 mg /kg diet, respectively. CrMet supplementation improved body weight (BW) at 6 weeks of age by 2.3%. compared with those on diet 1 (control). Feed intake (FI) increased gradually by increasing CrMet levels in the diets compared with the control group and the group fed on 200 mg CrMet /kg diet. The best (P≤ 0.05) value of feed conversion ratio (FCR) was noticed in group fed 600 mg CrMet /kg as compared with other experimental groups. CrMet improved (P ≤ 0.01) the thymus, heart and testes weights, white blood cell (WBC) counts, hemoglobin (Hb), Packed cell volume (PCV%), and monocytes of growing Japanese quail. Also, Alanine aminotransferase (ALT) and total antioxidant capacity, while albumin, albumin/globulin ratio, aspartate aminotransferase (AST), total lipids, cholesterol, triglycerides, and lipid peroxide concentrations contents decreased significantly (P ≤ 0.01). In summary, inclusion of CrMet in growing quail diets may exert beneficial effects on growth parameters, blood constituents, immunity, and anti-oxidative properties.