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Background: The patients who have human immunodeficiency virus, are susceptible to opportunistic infections and tumors due to disease progress and their immune system suppression. Early diagnosis and suitable management of these patients can decrease their mortality and morbidity. Present study was performed for determination of prevalence of viral hepatitis B and C and high risk behavioral among HIV patients. Methods: Present cross sectional study was performed on 481 HIV patients in consultant clinic of behaviors disorders of west Tehran hygiene center at September 2014. Demographic and behavioral data and serum viral hepatitis B and C measurements in participated patients were gathered in the study checklist. Results: Among 481 HIV patients, 331 (68.8%) and 32 (6.6%) patients had hepatitis C and B co-infection and ninety-three patients had only HIV infection. Co-infection of HCV and HBV infection were diagnosed in 25 (51.9%) HIV patients. Conclusion: There were significant association between high risk behaviors with HCV infection and drug abuse, common syringe use with both of HCV and HBV infection among HIV patients. Keywords: High risk behaviors; Human immunodeficiency virus, Viral hepatitis B, Viral hepatitis C.