This study was conducted to compare the effect of four package systems on quality criteria of mullet's fish fillets stored at 4±1°C for 18 days. Modified atmosphere packaging (MP1, 60% CO₂ \ 35 % N₂ \ 5 % O₂ and MP2, immersing  fillets in sodium chlorides solution prior to package with the same condition of MP1) suppressed (p<0.05)the growth of total count and psychrophilic bacterial when compared with aerobic (AP) and vacuum package (VP). During storage period aerobic package taken the highest physicochemical, microbial load and the lowest sensory scores. Likewise, MP1 and MP2had lowertotal volatile basic nitrogen, Trimethy lamine nitrogen, Thiobarbituric acid and microbial loadcompared toaerobic package samples (p<0.05). However, MP2 showed exudate loss lower than MP1. Thiobarbituric acids of the samples kept VP were lower compared to other condition package in the same time. Overall acceptability of MP1, MP 2 and VPsamples were accepted during storageof fifteen, eighteen and twelve days, respectively. While, aerobic package samples had the acceptability six days only. Therefore, MP2 was a best choice for extending the shelf-life and maintained the quality of mullet's fish fillets.