Introduction: Hepatitis B is an infectious disease as a major health problem worldwide. Since the selection of an educational model results in its start and continuation in a right destination, the purpose of the present study was to determine the knowledge, beliefs and performance of Malayer city’s health volunteers about hepatitis B based on the health belief model (HBM).

Methods: In this cross-sectional study, 272 health volunteers of Malayer city were selected by the census sampling method, in 2015. Data were collected by the self-report method through a questionnaire prepared by researcher and verified its validity and reliability. The questionnaire included the demographic information of the health volunteers and knowledge, performance and dimensions of the HBM. Finally,the data were analyzed using software SPSS 20 through the correlation and linear regression.

Results: Among the structures, the perceived benefits had the most score (26.86) and the perceived barriers had the lowest score (95.43). In regression analysis to predict behaviors, the variables: self-efficacy, knowledge and foreign practice guide were detected. These variables could predict totally 31% of behavior’s changes (P<0.001).

Conclusion: Based on the findings obtained by the current study, in design of educational interventions, structures of self-efficacy, knowledge and foreign practice guide should be emphasized as the most important predictors of health volunteers’ behavior.