In the purpose to reducing excretion of nitrogen (N) and phosphorus (P) without the influence of the growth performances and abdominal fat in broilers, a feeding trial and balance test were conducted. Four diets were prepared. The control diets (C) contained ,-ῌ crude protein (CP) for * to ,+ days of age and +3ῌ CP for ,, to .3 days of age, respectively. In the second diets (L), CP were reduced to +3 and +0ῌ for both phases and crystal amino acids were added to be ++*ῌ of requirements at both phases. In the third diets (LE), an enzyme mixture (cellulase, xylanase and pectinase) was added to L. In the fourth diets (LEP), non-phytate P were reduced to *.-,ῌ and *.,2ῌ for both phases, and phytase was added. Eight hundred one-day-old broiler chicks, equal number of male and female, were divided into. treatments and given free access to one of the diets for .3 days of age, and body weight (BW), feed intake and mortality were recorded. At the end of experiment, /* chicks per each treatment were slaughtered by bleeding through a jugular vein and eviscerated for the determination of abdominal fat. Using another +* male broiler chicks per each treatment, excretion of dry matter (DM), N and P were determined by the balance test. There were no significant di#erences in BW gain, feed intake, feed conversion ratio and mortality among four treatments. Abdominal fat of broilers fed L was significantly heavier than that of other three treatments, and no significant di#erences were found in abdominal fat among other three treatments. Excretion of DM and N in L, LE and LEP decreased to 3+, 2. and 2,ῌ, and 1-, 1* and 1*ῌ of C, respectively. Excretion of P of broilers fed LEP decreased to a half of other three treatments, and there were no di#erences in P excretion among other three treatments.