Objective: Population aging has become one of the most significant demographic processes of modern times. Aging and its consequences is become one of the major population – related issues in all countries. At present Iran is undergoing population transformation from a young age structure to an old age one. Aging is a sensitive period in human life. Thus attention to needs and problems of this period has an especial importance. One of the domains that need to more attention in elderly life is their quality of life and its effective factors. Quality of life in elderly peoples means more emphasis on social policy and reforms of social goals. As the population of older people in Iran increases in number and proportion, it is important to understand which factors are associated with elderly quality of life. The purpose of this research is to explore the effects of social support on the quality of life of elderly peoples in region 2 of Tehran. Methods: This study is a cross - sectional study and descriptive analytical kind. that information has collected with using of elderly specific quality of life questionnaire (Lipad) and Norbeck social support questionnaire in a sample of 100 elderly in region 2 of Tehran. Finding: In this study the range of men’s quality of life scores was 28-87 with the means of 61.45(SD = 13.83) and the range of women’s quality of life scores was27-70 with the means of 51.76 (SD = 12.50). and also with using of correlation test got appeared that there is a significant relation between all kinds of social support (functional, structural, emotional, aid) and total quality of life (P < 0.05).but in regression analysis only the significance of structural and emotional support approved. Results: In this study emotional support had most effect on elderly quality of life and social support types had most correlation with social dimension of quality of life. Thus the necessity of considering social determinant of health in the elderly as such social support has notably important.