This paper reports on a project aimed at creating support groups for caregivers of the frail elderly and assessing their impact on participants. The effect evaluation was based on a quasi-experimental design with repeated measures (n = 120). The results show that participation in support groups did not lower the caregivers' subjective burden, and indeed contributed to its increase. Conversely, such participation appears to have had a stabilizing effect on their level of depressive symptoms. Both these effects, reported at the end of the support group experience, persisted three months later. Various possible explanations of these contradictory results are discussed.