Well-being is mostly defined and measured in terms of life satisfaction, positive affect, and negative affect in psychology. As human well-being depends on need satisfaction, and many of our needs as humans are satisfied with and by other people, it is argued in this chapter that the current conceptualization and measurement of well-being is inadequate. Specifically, although there are some expectations, psychological research on well-being has largely neglected the social aspects or the context of well-being. It is thus argued that in order to understand the social nature of well-being several dimensions have to be considered. The proposed dimensions are social integration, social acceptance, social contribution, social actualization, and social coherence. Results from a validation study provide tentative empirical support for the proposed conceptual structure.