摘要:Background: Breastfeeding depends on social and cultural conditions of societies. Behavior,Attitude, Subjective Norms, Enabling Factors (BASNEF) model is one of the comprehensive models of behavior study, especially in developing countries. This study was performed to investigate the status of breastfeeding during the first two years of infants' life and its risk factors through BASNEF model structures. Materials and Methods: In this cross-sectional descriptive-analytical study, 406 mothers with 6-24-month-old babies were selected by multistage cluster sampling method. The data were collected using a questionnaire with five sections based on the BASNEF model structures. Demographic characteristics of the studied population were also recorded and analyzed using Chi-square tests and analysis of variance in SPSS 18 0.05). Conclusion: In addition to knowledge of nursing mothers, supports and encouragement of husbands, mothers and mother-in-laws, as subjective norms of behavior, have a positive impact on the breastfeeding behavior of mothers. Thus, breastfeeding programs should pay more attention to the role of these mentioned factors.