Background: Many studies have indicated that the use of social networks and online communication by seniors can improve their general health and social welfare as well as promote the quality of their lives. However, problems with the use of online social networks may prevent them from using the networks. This study aims to explain the experiences of older adults when facing barriers and challenges of using social networks. Methods: This qualitative study takes a phenomenological approach and was carried out in 2016 using purposive sampling. We collected the in-depth semi-structured interviews with 9 seniors) 3 males and 6 females) with an average age of 68.3 years. Subjects confirmed to be active members in at least 1 of the online social networks. The data were analyzed using Colaizzi's 7-step method. Results: Two main themes of "preconditions of use" and "individual concerns" were extracted from the data analysis. A total of 6 relevant subthemes were as follows: "need for equipment and facilities," "adequate income", "need for technical knowledge", "trust in information", "trust in other users", and "security and privacy". Conclusions: People of older age reported barriers and difficulties using online social networks. It seems that the elderly can be encouraged to use these social networks and improve the quality of their lives through educational planning.