This study was carried out to investigate the effect of rosemary, basil and garlic oils on some productive performance, caecalmicroflora and blood parameters of broiler chicks. A total number of 400 one-day old broiler chicks were used. The chicks were divided into 10 groups included one control and 3 groups for every type of the used oils. Each of the tested oils was used at an inclusion rate of 0.25, 0.50 and 1.00 g/kg diet. The obtained results revealed that, the birds fed 0.25 g rosemary oil/ kg basal diet had normal feed conversion ratio concurrent with significantly lower feed intake; normal dressing percentage, normal relative organs weights, except relative abdominal fat weight that increased significantly, normal average pH, higher beneficial bacteria, lower pathogenic bacteria, normal biochemical parameters included cholesterol, triglycerides, AST and uric acid. Whereas, lower significantly in ALT and creatinin and higher in overall parameters acceptance of sensory evaluation as compared to the control group. The birds fed 0.25 g basil oil/ kg basal diet had normal dressing percentage, relative organs weights, average pH and beneficial bacteria; significantly lower pathogenic bacteria, normal biochemical parameters included AST and uric acid. Whereas, lower significantly in triglycerides, ALT and creatinin and normal in overall parameters acceptance of sensory evaluation as compared to the control group. Whereas, positive effect of garlic oil was noticed at a level of 0.50 g/kg basal diet as it caused normal feed conversion ratio concurrent with significantly lowest feed intake; normal dressing percentage, relative organs weights and average pH, lower pathogenic bacteria, lower significantly in triglycerides, AST, ALT and creatinin. Whereas, obtained normal uric acid andhigher overall parameters acceptance of sensory evaluation compared to the control group.