Abstract: The effect of oral administration of meclofenamic at doses of 10, 20 and 40 mg kg-1 body weight on sperm traits, secondary sex characters and some metabolites in male chicken was investigated. No difference between normal motility and defect sperm in control and treated birds. Weight of walttles and combs were not affected. Testosterone, ascorbic acid, total protein and cholesterol concentration were similar in control and treated groups. It is suggested that no adverse effects on semen quality were observed.