Outsourcing is the assignment of some internal activities of an organization to its supplier outside the organization and the assignment of decision-making rights to the external supplier based on the contract. The purpose of this research was to investigate the factors affecting the development of outsourcing in public and private sports venues in Tehran. This research was applied and in terms of exploratory-descriptive purpose, the information was collected in the field and with the interview research tool from experts in the field of sports management and outsourcing. The statistical population of the research was made up of sports managers and sports management professors. In this research, the snowball sampling method was used with a sample size of 12 people to achieve theoretical saturation. Also, in this research, thematic analysis was used to describe and analyze the data. After reviewing the interviews and during the coding process, concepts and categories were inferred and extracted from the questions of human resources management, financial resources management, asset management, internal process management, legal management, marketing management and departments with outsourcing capabilities. The results of the research showed that in the discussion of human resources management, it is better to provide workshops on outsourcing and the basics of outsourcing for employees. In the discussion of financial management, the cultural, economic and social factors of the users of sports facilities should be considered. In the matter of asset management, a chapter should be set up in the Ministry of Sports with the title of provisions for outsourcing of sports venues to avoid all possible problems. In the discussion of internal processes, policies should be made at the macro level of sports organizations in order to outsource sports venues. In the discussion of legal management, managers of sports venues when outsourcing sports venues must determine the outsourced items in the contracts in full. In the discussion of marketing management, differences should be taken into account in the legislation regarding the marketing of private and public sports venues. In the discussion of parts that can be outsourced, the outsourcing of sports equipment for the development of sports in different dimensions should be considered.