The aim of this study was to model the causal relationship between serious leisure and perceived well-being of recreational cyclists, considering the moderated mediating role. This research is descriptive-correlational in nature and applied in purpose, conducted using a field method.The statistical population included recreational cyclists in Tehran who engage in cycling at least once a week during suitable seasons. Given the lack of precise statistical data, the population was considered unlimited, and based on Morgan's table, a minimum of 384 questionnaires were distributed using a convenience sampling method. The research instrument was a questionnaire, and data analysis was performed using structural equation modeling (SEM) with SmartPLS 3 software. The findings indicated that all direct effects were positive and significant. Additionally, it was revealed that satisfaction with leisure activities plays a positive and significant mediating role in the relationship between serious leisure and perceived well-being among recreational cyclists.The results suggest that balancing serious leisure and perceived well-being is a critical factor in enhancing satisfaction with leisure activities. Higher levels of commitment and motivation toward a specific activity lead to greater satisfaction and a more positive impact on perceived well-being.These findings underscore the importance of designing targeted leisure programs to promote well-being.