Currently, organic lead poisoning is an increasingly common disease in our country.  The most common  risk of organic lead poisoning are people regularly exposed to leaded gasoline. In the research contents, the author has identified the lead content in hair on people regularly exposed to leaded gasoline in some areas of Thai Nguyen City by the method for atomic absorption spectroscopy with Flame Atomic Absorption Spectrophotometric (F-AAS). Results showed that lead content in the hair of people exposed to leaded gasoline was 50.8533  13.911 (μg/g) that higher than that in hair of people less exposed to leaded gasoline is 16.4038  2.4411μg/g.