This study was designed to investigate the effects of different levels of soybean oil and Oregano powder on carcass quality and intestine histology in Japanese quail. A total of 42 quails with an average weight of 28±1.9 g at 10 days of age were divided  into seven treatments (Group 1: control; Group 2: 1% Oregano powder + 0.5% soybean oil, Group 3: 1% Oregano powder + 1%  soybean oil; Group 4: 1% Oregano powder + 1.5% soybean oil; Group 5: 1.5% Oregano powder + 0.5% soybean oil; Group 6: 1.5% Oregano powder + 1% soybean oil; Group 7: 1.5% Oregano powder + 1.5% soybean oil). Each treatment was further divided into three replicates (six quails per replicate). At the end of the experiment, two quails of each sex were selected randomly to evaluate the quality of carcass of each replicate. Breast weight increased significantly in group 7 and abdominal fat decreased in group 4. Height and depth of intestinal villi increased significantly (P<0.05) in group 7. Based on these results, we concluded that 1.5% Oregano powder+1.5% soybean oil improved the performance and intestinal histology of quails.