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This study was carried out to investigate the effect of wormwood meal addition on constituent of blood, and liver fatty acid in broiler chickens. Two-day old 25 male commercial broiler chicks were distributed to 5 treatments (wormwood meal levels ; T1 (1%), T2 (3%), T3 (5%), T4 (10%), and control (C)) for 5 weeks. Free fatty acids of liver were a little different among the treatments and the palmitic, stearic, oleic, and linoleic acids were occupied 92.5% of total free fatty acids. Hemoglobin and hematocrite concentration of blood were significantly decreased (p<0.05) as the levels of wormwood meal increased, and serum albumin concentration of broilers was little different between 0 week and 5 week experiments. Also serum cholesterol, phospholipid, total cholesterol, and triglyceride concentration of liver in broilers were little different during the 5 weeks experiment. Serum triglyceride concentration was significantly increased (p<0.05) as levels of wormwood meal increased. These results indicate that dietary wormwood meal addition has a little positive effect on increasing unsaturated fatty acid and decreasing saturated fatty acid.