This experiment was carried out to dertermine the proper level of dietary protein and energy in the chick starter ration and grower ration with 360 female chicks of Single Comb White Leghorn (Colonial Strain). Experimental results obtained are summarized as follows: 1. Protein level of 21% in starter ration resulted significantly (P$lt;0.05) better rate of growth than 19% of protein. With the same level of protein, growth rate has been increased as the level of dietary energy increased from 1150 ㎉ to 1350 ㎉ per pound of feed. Rate of growth has also been increased as the level of protein and energy in the gower ration increased. 2. Significantly less (P$lt;0.05) feed has been consumed by the chicks fed high protein-high energy starter ration. Likewise feed efficiency has been significantly (P$lt;0.05) improved by the chicks fed high energy ration. In grower ration high energy level signific antly (P$lt;0.05) improved feed efficiency, although protein level did not exert any effect. 3. In the chick bodies of 6 weeks old the protein content has been increased as the dietary protein level increased, although no difference in the chick bodies of 12 weeks old has been found. Fat content of chick bodies was a direct reflection of energy concentration of the diet tested. 4. The utilizability of dry matter, protein and NFE in the ration has been slightly improved as the level of dietary protein increased. Increasing protein level of diet resulted improvement the nitrogen retention when only 19% of protein has been fed. 5. Feed cost per Kg gain of chicks was cheapest when the dietary level of protein and energy was 21%-1350 ㎉/lb in the starter ration, and was cheapest when the level of protein and energy was 17%-1150 or 1250 ㎉/lb in the grower ration.