This experiment was carried out to study the effect of the plane of nutrition on the body composition, growth rate and blood cholesterol in chickens with 120 birds (60 male and 60 female) of Single Comb White Leghorn. The main observations made are as follows: 1. No significant difference in the chemical composition in the chicken bodies was found between male end female at the beginning o the experiment (2-day old). 2. High plane of nutrition (protein 25%-energy 1500 ㎉/lb) resulted significantly (P$lt;0.05) more deposition of protein in the bodies of chicks at 3rd week of age khan low plane of nutrition. On the other hand, the content of fat was significantly (P$lt;0.05) higher for the birds fed low energy-low protein diet than the birds fed high energy-high protein diet. However, no significant differences were found between DM, water and ash content of birds. 3. Dry matter and protein content of chick bodies kept tin high plane of nutrition was significantly (P$lt;0.05) higher than those kept on low level of energy and protein in the ration at 5 weeks of age. In sex difference, the male birds contained significantly (P$lt;0.05) greater amount of protein in the bodies than female birds on the diet of given plane of nutrition. On the other hand, the content of fat and ash in the bodies of bird was not significantly affected by the level o dietary energy and protein at 5 weeks old chicks. 4. Although no statistical difference was found, the content of DM and protein in the bodies of birds received high protein diet was slightly higher than those fed the diet containing low level of protein and energy on the wet and dried basis at 8 weeks old chicks. It was found that the concentration of fat and ash in the bodies of birds was not influenced by either sex or plane of nutrition at this age. 5. Even though no significant difference in chemical composition was found by the sex or plane of nutrition at 10 weeks old chicks, amount of fat in chicken bodies was increased as the level of energy in the ration was increased. In sex difference, the female birds gradually increased the fat content in the bodies than the male birds as they get older. 6. The body weight gain was significantly (P$lt;0.05) greater for the bird fed the high level of dietary energy and protein than those fed the low levels. 7. Amount of feed consumed was significantly (P$lt;0.03) less for the chicks fed high plane of nutrition than for the chicks fed low plane of nutrition. The feed efficiency was significantly (P$lt;0.05) improved by the chicks fed the high energy-high protein diet (10% perilla oil added) 8. In blood cholesterol content, the bird received 10% of perilla oil in the ration (high plane) had significantly (P$lt;0.01) hiss blood cholesterol than those fed the low plane of nutrition.