Research has shown that people tend to perceive the groups to which they belong (e.g., national groups) as temporally persistent. In this paper we argue that enhanced perceptions of collective continuity lead to lower levels of anomy and misfit, and to higher levels of social well-being (SWB). Furthermore, we argue that the effects of perceived collective continuity (PCC) on SWB are mediated by collective self-esteem (CSE). Finally, we contend that PCC has positive effects on perceived group entitativity (PGE), which in turn has a positive influence on CSE. This model is tested by means of a cross-sectional study using a sample of Spanish nationals (N = 145) drawn from the general public. Results confirm that the data fit the model well. These findings are in line with research demonstrating that a sense Of personal continuity through time is related with better mental health and personal well-being. Copyright (c) 2007 John Wiley & Sons, Ltd.