Grass carps (8. 49 ±0. 04g) were randomly assigned to 12 tanks (30 fish/ tank) and fed with three experimental diets , which contained 30 % different types of starch (corn starch , wheat starch and rice starch) for 80 days. Daily feeding rate was 3 % wet weight. The results showed that there was no significant difference in growth of fish fed with wheat starch , corn starch and rice starch , even though highest carbohydrate apparent digestibility coefficients occured in wheat starch fed fish. While viserosomatic index , hepatopancreatic fat content , plasma trigliceride level and percentage mesenteric fat were significantly higher in fish fed with wheat starch than in those fed with rice starch. The differences in body composition were small except that the body fat content of fish fed with rice starch was relatively lower than those fed with corn starch or wheat starch.