In order to evaluate the nutritive value of crude and refined fish oils as a high energy feed, a feeding experiment was conducted employing 3 days old 200 broiler chicks of Hisex-Hibro strain for a period of 6 weeks. Birds were distributed into 5 experimental treatment groups with 4 replicates per treatment, consisting of control (starter; rice bran oil, grower; soybean oil), crude fish oil 5%, deoxidized fish oil 5%, decolorized fish oil 5% and deodorized fish oil 5%. The results obtained are summarized as follows: 1. Linoleic acid content of fish oils used in this study was considerably lower than soybean oil and rice bran oil, but arachidonic acid content of the fish oils was slightly higher than those of the vegetable oils. The acid value of crude fish oil was considerably higher (17.30) than those of other oils. 2. Body weight gain was slightly decreased by feeding crude or refined fish oils at 5% level. And it was found that body weight gain obtained from 5% deodorized fish oil group was significantly (p$lt;0.01) decreased. 3. There was a significant (p$lt;0.01) decrease in feed consumption for crude or refined fish oil groups. The amount of feed intake by deodorized fish oil group was significantly (p$lt;0.01) smaller than those of other fish oil fed groups. 4. No difference was observed in feed efficiency (feed/gain) and nutrients utilizability of the experimental diets among treatments. 5. Mortality was not affected by oil sources, but only crude fish oil group showed 2.5% mortality. From the results of present experiment it may be concluded that the use of deoxidized fish oil rather than crude fish oil would be desirable in broiler rations because of the lethal effect of the crude fish oil. Further study maybe necessary for the use of refined fish oils or mixture of fish oil with the other animal or vegetable oils, as feedstuffs and for the determination of the proper level of usage in broiler rations.