Abstract Aim Social networks, all social relationships that people have, may influence people’s health behavior and well-being, which was evaluated in this qualitative study in older adults. Furthermore, we evaluated people’s needs for strengthening social networks. Subject and methods For this qualitative study, semi-structured interviews were conducted between May and July 2021 among 24 adults aged 60 years and older. Results Respondents provided information on social network structure (number and types of relations) and function (social support). They received informational support from friends, emotional support from their partner/spouse, and all types of support (including practical support) from family. Respondents stated that their health behavior was mainly influenced by a partner/spouse. Family and friends were mostly for socializing. To strengthen networks, in-person bilateral or small group interactions were preferred. Conclusion Family and friends were important social supporters and positively influenced health behaviors. This study emphasizes the importance of social networks in health promotion.