This research was undertaken in order to determine the impact of nutritional vitamin E on genetic expression of Interferon-gamma (IFN-γ) and Interleukin-1β (IL-1β) as pro-inflammatory and Interleukin-4 (IL-4) and Interleukin-10 (IL-10) as anti-inflammatory cytokines in spleen and liver, heamagglutination inhibition antibody titers (HI titers) against Newcastle Disease Virus (NDV), total protein, albumin, globulin and growth efficiency of broiler chickens. Seventy two one-day-old Cobb broiler chicks had been allocated randomly into two groups. Each group has 3 replicates, each with 12 chicks. The first group was given basal diet. The second group was fed the basal diet with vitamin E (100 mg/kg diet). The obtained results revealed that dietary supplementation of vitamin E significantly (p