Not long ago, Researchers try to find a suitable alternative source from the cereal by-product instead of yellow corn. Today there is a global shortage in cereal production, so to archive goals to make less dependent on regular cereals which used in human feeding we have to examine using unusual feed staff like Rice bran. Our experiment was carried out in poultry farm, Department of Animal Production, Faculty of Agriculture/ University of Kufa to explore the broiler productive performance of Rose 308 fed rice bran diets with partly replacement of Yellow Corn. 225 chicks were used in our study by distributing them into 5 treatments as trails: (T1) control (50% yellow corn), T2, T3 substituted 5, 7.5 % of raw rice bran by yellow corn respectively, T4, T5 substituted 5, 7.5 % of Rice bran (treated with Ascorbic acid) by yellow corn. Our results show that: No significant differences in marketing live body weight, body weight gain, accumulative feed consumption and accumulative feed conversion ratio for experimental groups fed diet supplementing by Raw Rice bran or preserved by Ascorbic acid with control group, which main feeding broiler by rice bran diets has enhanced growth performance in broiler chicken. Our indication is substitution of 5 or 7.5 % rice bran with yellow corn had no bad effect on broiler performance.