This study was conducted to estimate the effect of adding different levels of turmeric powder and curcumin on broiler performance, carcass traits, and immunity response and jejunum histology. A total of 750 Ross day old chicks obtained from a local hatchery and distributed into two rearing conditions (normal and heat stress condition) with five treatments 3 replicate for each one had (25 chicks). Dietary supplements of turmeric powder and curcumin significantly (P = 0.05) improved performance under normal and heat stress conditions. Moreover, treatments significantly (P = 0.05) increased the total titter antibody against Newcastle and infectious bursal disease compared to control. Concerning histology of jejunum treatments significantly (P=0.01) improved jejunum histology. Regarding the effect of rearing condition heat stress conditions significantly (P = 0.01) decreased performance compared to normal rearing condition. Small intestine percent from live body weight significantly (P = 0.01) decreased compared to normal rearing conditions. Moreover, heat stress significantly (P=0.01) affected the total antibody titer against Newcastle disease and infectious bursal disease. Jejunum histology significantly (P = 0.01) affected by rearing conditions.