In this study body weight traits at hatch, 14, 28, 42 and 49 days, age of sexual maturity, carcass yield and mean of daily weight gain were compared in three strains of Japanese quail. 51 male and 51 female of each strain were randomly selected from the base population, located in separate cages and collected their eggs in every day and for two weeks. Mean of hatch weight in wild, black and white strains was 7.2, 7.1 and 6.9 respectively and differences were not significant. Body weight in other ages was significantly affected by strain and sex(p<0.001). Difference between LSM of carcass yield in wild, black and white were not significant. Age of sexual maturity in females in wild strain was more than that the rest. Difference of Mean of weight gain in three strain were significant except ages of 1 to 14 and 42 to 49 days (p<0.05). The result of this study indicated that wild strain have highest performance.