The study of psychological well-being is a really important issue of the modern society and the contemporary science. Many mental disorders and psychosomatic diseases are anteceded by mood decline, experience of ill-being. If the sense of satisfaction is absent, tensions, inconsistency in actions appear and overall functional efficiency decreases. The life style of very many people has undergone dramatic changes over the last 20 years. One of the main reasons for these changes is emergence of the Internet and its special faculty – social networks. It is well known that communications are a necessary structural component of psychological well-being. Emergence of social networks has expanded communicative opportunities to virtual infinity; at the same time, such communications swallow up personal time and efforts. This article makes an attempt to analyze peculiarities of personal behavior in social networks depending on a personal level of psychological well-being. Students of the Kyiv National University (Kyiv, Ukraine) and working youth have been examined with Ryff’s Scales of Psychological Well-Being and our structured interview. The obtained results show differences in attitudes and behavioral patterns in social networks depending on a person’s level of psychological well-being.