ABSTRACT: The aim was to evaluate the yeast saccharomyces cereviciae (Sc) in broiler diets on performance, blood characterize and percentage of edible parts. Two hundred fifty boilers (1 to 42 day old) were distributed into four treatments. The results shows sigmficant effect (P 0.05) for chicks fed with the percentage levels 0.75% , 1.00% level shows the highest weight gain, low feed conversion ratio large gizzard, low mortabilty low H/L ralio and low cholesterol.