Introduction & Aim: The aim the present study is to examine the effects of Boswellia serrata Triana & Planch on (immune response) performance and carcass characteristic in broiler chicks.Experimental: In this study, 360 one day old chicks (Ross 308) were allocated to six treatments with four replicates in a completely randomized design for a six week period. Treatments consisted of the basal diet supplemented with 0.0 (control), 0.1, 0.15, 0.2, 0.3 and 0.5% B. serrata. Results & Discussion: The findings showed that feed intake of broilers fed control diet was significantly (p<0.05) higher than broilers fed 0.50% B. serrata in the grower period, also weight gain of broilers fed control diet was significantly (p<0.05) higher than broilers fed 0.30 and 0.50% B. serrata in the starter and grower period, but feed conversion ratio of broilers fed 0.50 % B. serrata was significantly higher than broilers fed control diet in the grower period. Application diet containing 0.15% of B. serrata led to the best feed conversion ratio in the total period, while the differences were not statistically significant. Percentage of gizzard to body weight, intestinal and seca length of broiler fed diet containing 0.5% of B. serrata was significantly (p<0.05) higher than broiler fed control diet.Industrial and practical recommendations: Although it has some positive effects on immune system of all creatures, according to the findings of this study, using Boswellia serrata especially in first period of broiler chicks, is not recommended and it needs more research. Manuscript profile