The main objectives of this study are to investigate the effect of photoperiod and methionine levels on growing and laying Japanese quail. Results obtained seemed to justly the following conclusion:1. The photoperiod of 24hrs/day and methionine level of 100 or 115% of the NRC recommended level is suitable for growing Japanese quail chicks from 1 to 6 weeks of age.2. The photoperiod of 24hrs/day along with 115% methionine level of the NRC recommended recorded the highest values of carcass and dressing percentages.3. Productive performance for laying Japanese quail improved under 20hrs/day photoperiod and by diets contained 100 or 115% of the methionine level recommended by NRC (1994).4. A continuous light (24hrs/day) or 16hrs/day photoperiod gave the earlier sexual maturity for Japanese quail than that reared under 8hrs/day.5. No significant influences observed in egg quality due to photoperiod and methionine level except, decreasing yolk index with diets contained 100 or 115% of the NRC (1994) recommended level of methionine and increasing albumen% for layers fed diet contained 115%.6. Results showed no significant differences in fertility and hatchability percentages due to photoperiod, methionine level and their interaction during 8-20 weeks of age.7. Correlation coefficients, among the traits studied significantly (P < 0.05 and 0.01) varied between negative and positive values.