en مطالعات سالمندی Aging Studies پژوهشي Original Research Articles <div style="text-align: justify;"><strong>Objectives:</strong> Health refers to the condition of perfect physical, mental and social well-being. The appropriate social well-being is the opposite of loneliness and depression. Social well-being is a psychosocial concept that is affected by many factors. This study determined the relationship between social function and social well-being in older adults.<br> <strong>Methods: </strong>This was a descriptive-analytical study that was conducted on 550 older adults in Tehran. The participants were selected by multistage cluster sampling. Data was collected using Social Well-being Scale and Social Adaptation Self-evaluation Scale. Data were analyzed using Pearson coefficient and linear regression analysis in SPSS v. 22.<br> <strong>Results: </strong>The mean age of participants was 66.10&plusmn;6.68 years. The female participants accounted for 41.1% of subjects. There were significant correlations between all aspects of social function (quality of activities and the quality of relationships) and social well-being dimensions (P<0.01). The quality of activities had significant positive effects on all aspects of social well-being (P<0.01), and the quality of relationships also had significant effects on different aspects of social well-being, except on social coherence (P=n.s).<br> <strong>Discussion:</strong> The findings showed that the social function affects social well-being. So individuals with higher social functioning also have higher social well-being and mental health.</div> Mental health, Social conditions, Aged, Older adults 135 140 http://irj.uswr.ac.ir/browse.php?a_code=A-10-565-1&slc_lang=en&sid=1 Pouya Farokhnezhad Afshar pouyafarokhnezhad@yahoo.com No Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Mahshid Foroughan m_foroum_foroughan@yahoo.comghan@yahoo.com Yes Iranian Research Center on Aging, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Abou Ali Vedadhi vedadha@ut.ac.ir No Department of Anthropology, Faculty of Social Sciences, University of Tehran, Tehran, Iran. Mahmoud Ghazi Tabatabaei smghazi@ut.ac.ir No Department of Anthropology, Faculty of Social Sciences, University of Tehran, Tehran, Iran.