Abstarct: The present study aimed to examine the effect of organizational commitment on employee green behavior through the mediating roles of social well-being, psychological well-being, and work-related social media use. The main research problem was to determine how organizational commitment can strengthen employees’ environmentally friendly behaviors in the workplace and whether employee well-being and work-related social media use can explain this relationship. In terms of purpose, this study is applied, and in terms of methodology, it is a descxriptive-survey and correlational study. The statistical population consisted of employees of Fooman Shimi Asli Company in Tehran, estimated at approximately500 individuals. baxsed on Cochran’s formula for finite populations,217employees were selected as the sample. A proportionate stratified random sampling method was used, and the data were collected through a standardized 23-item questionnaire baxsed on a five-point Likert scale. Data analysis was conducted using SPSS and SmartPLS software, and the structural equation modeling approach was employed. The findings indicated that organizational commitment has a positive and significant effect on employee green behavior, psychological well-being, social well-being, and work-related social media use. In addition, psychological well-being, social well-being, and work-related social media use had positive and significant effects on employee green behavior. The mediation test results also showed that psychological well-being, social well-being, and work-related social media use mediate the relationship between organizational commitment and employee green behavior. Furthermore, the coefficient of determination for employee green behavior was 0.390, and the overall goodness-of-fit index of the model was0.393, indicating the acceptable explanatory power and favorable fit of theresearch model. Therefore, it can be concluded that enhancing organizational commitment, improving employee well-being, and promoting the purposeful use of work-related social media can provide a basis for strengthening employee green behavior in organizations.