The present study was aimed to assess the phytosterol supplementation on broiler meat quality and mechanism involved. One hundred and twelve days old Avian male Ross broiler chickens were offered commercial diet (control), second group fed with Castastesrone, a kind of Polyhydroxy phytosterol, (15, 20, and 25 g/kg diet) and third group fed with, β-sitosterol, a kind of hydroxyl phytosterol, (25, 50, and 75 g/kg diet) for 21 days. Phytosterol showed non-significant (p<0.05) effect on the feed efficiency and feed conversion ratio (FCR), however body weight momentously increased in phytosterol group. The body weight showed significant correlation with hydroxyl Phytosterol content. Fast growing chickens have larger diameter fibers than slow growing lines due to supplementation of β-sitosterol. Supplementation of 50g and 75g β-sitosterol resulted in the body weight of 656.07±12.52g and 647.13±7.45g, respectively. Moreover, antioxidant capability of broilers was improved significantly (p<0.05) by the addition of dietary phytosterol in feed. Finally, phytosterol addition did not affect the texture properties (p<0.05) of meat. The present results suggest that phytosterols improve meat quality by increasing the antioxidant enzyme levels of broiler chickens.