abstract social capital is one of the most important topics in the attention of academic and research circles in the last decade that can be defined as a set of norms, informal values, conventional rules and ethical obligations that form the reciprocal behaviors of individuals, but contribute to enhancing cooperation and social participation, and thus contributes to increasing engagement and social capital. On the other hand, there is a close relationship between the environmental quality of urban spaces and social capital without which it is not possible to upgrade capital in urban spaces. In the descriptive - analytical method this paper examines the quality dimensions of urban spaces and its relation with social capital, which has benefited from data collection tools including library studies and documentary studies. in the end, the components and quality criteria of urban spaces are mentioned in line with the promotion of social capital.