This study was carried out to determine the level of substituting soybean oil meal for imported fish meal in broiler diets. For the experiment, the levels of 0, 2.0, 4.0, 6.0 and 8.0% of imported fish meal were added in the respective diets to replace soybean meal on an isocaloric and isonitrogeneous basis. In addition to these, 6.0% of domestic fish meal group was also designed to compare the effects of from that of imported fish meal. A total of 360 (mixed sex) broiler type of chicks were raised from the day of hatching for a period of 8 weeks. The results obtained are summarized as follows; 1. There was a significant decrease in body weight gain (p$lt;0.05) as the feeding level of the imported fish meal decreases. However, Duncan`s multiple range test shows no difference among the groups of 4.0%, 6.0%, 8.0% of imported fish meal and 6.0% of domestic. 2. Feed consumption decreased significantly (p$lt;0.01) as the fish meal feeding level decreases. However, there were no statistical significance in feed conversion rate among the treatments. 3. An economic analysis shows higher earning for the groups of 6.0% and 8.0% of imported fish meal, the gross incomes 143.35 and 141.41 per chick, but the statistical significance was shown among these experimental groups. 4. A separate test was also carried out by using a total of 120 broiler chicks to compare the difference between the effects of fish meal and that of Methionine. The experimental groups were designed; one to add 0.39% of Methionine in the diet without fish meal, and 8.0% of imported fish meal was used as a control. There were no significant differences in body weight gain or feed consumption, etc. However, the usage of fish meal for the place of DL methionine is shown to be more economical for the broiler production and this is due to the expensive present market price of Methionine. 5. In conclusion of the experiment, it was found possible to decrease the present usual proportion of imported fish meal 8.0%, down to 4.0% by substituting soybean oil meal at 28.5% in the broiler diets. And if Methionine is added to the broiler diets, it was found not necessary to mis any fish meal at all.