ABSTRACT Objective: To analyze the structure of the social network of people living with HIV and AIDS. Method: Exploratory and descriptive research with a qualitative approach, developed through interviews with twenty-two people living with HIV and AIDS, from November to December 2019. For analysis, the theoretical-methodological framework of social network was used. Results: The primary networks were of medium size and low density, formed by family members, relatives, friends, neighbors, and colleagues. The secondary networks were characterized by public, private, third sector institutions, workplaces, and by the informal network, which provided support according to the need for care. Conclusion: The family was considered the center of the primary social network structure; however, weaknesses in these social relationships were evidenced. The family relational context of the person with HIV and AIDS was influenced by the secrecy of the diagnosis due to the fear of prejudice and discrimination for being HIV-positive. There was a predilection for the services of the secondary social network that took on the role of specific care for the disease.