Abstract: This study was conducted in order to evaluate three different organic acids on broiler performance. The broiler performance have compared together with using RCD design with 7 treatments and 4 replicates which 420 day-old commercial Ross 308 chicks were divided into 28 groups. The six groups out of seven groups birds fed a diet with organic acids (citric, benzoic and tartaric acids) consist 0.5 or 1% level and one group fed with a diet control without organic acids for 49 days. The average of body weight gain, feed intake, feed conversion ratio and carcass percentage were analyzed and compared finally. The results showed no significant effects of diets with 0.5% organic acids (p<0.05) on all characters. One percent benzoic acid diets caused a significant decrease in the average of feed consumption from 21 to 42 days of age (p<0.05). The average weight gain at 21 to 42 days showed a significant decrease (p<0.05) that this effect was resulted of benzoic acid at 1% of dietary. There were no significant effects of organic acids dietary on carcass characteristics.