Abstract: The study was to evaluate the feasibility of replacing fish meal by oyster meat meal and to estimate the optimum level of replacement in the diet of broiler. 150 unsexed 7 days old "shaver starbro-15" broiler chicks were divided into 5 groups and each group was given any one of the five treatment/diets varying in oyestermeal and fish meal contents T1,T2, T3, T4 and T5. Weight gain was significantly improved in the dietary treatment T3 than that of T1 at all ages. The weight gain in T4 significantly improved during 2-8 weeks and was almost similar to T1 during the period of 2-8 weeks, while the weight gain in T5 significantly reduced than T3 but was similar to T4. Feed consumption was not affected by dietary difference between treatment. Feed conversion ratios were not influenced by dietary treatment during 2-6 weeks. However, tendency to better utilization of feed was observed in T3 all the periods and a significant improvement was observed in 7-8 weeks and 2-8 weeks. Protein efficiency in the dietary treatment T1, T2, T4 and T5 were similar but significantly improved in T3 in all the periods. T3 showed significantly better energy efficiency during 7-8 weeks and 2-8 weeks. While it was almost similar in other treatments. The performance indicator factor was the best in the treatment T3 from all other treatment. The feed cost per kg live weight gain was significantly reduced with the increasing level of oyster meat meal which replaced fish meal.