Aim: To know the seroprevalence of HBs antigen among the contractual workers engaged in small-scale Facor Alloy Factory located in rural area. Materials and methods: Blood samples collected from 1139 contractual workmen were screened for HBs antigen by using two rapid tests in tandem. They were asked about the risk factors associated with hepatitis B virus infection. Results: Forty workmen (3.5%) were positive for HBs antigen. The prevalence rate was highest in 51-58 years of age (6.7%). Fifty percent of HBs antigen positive individuals gave past history of tattooing compared to 19.1 % of those negative for HBs antigen. Fifteen percent of HBs antigen positive individuals had close household contact with a patient suffering from jaundice compared to 1 % in HBs antigen negative individuals. Conclusion: Overall seroprevalence rate of HBs antigen in the study group was less compared to other studies from rural areas. Tattooing and close household contact were the most common risk factors for acquiring hepatitis B virus infection in the present study.