Although many studies have been published over the past ten years on informal support of dependent elderly, few, if any, have examined the reticence of their caregivers to use formal support services. Further understanding of this phenomenon is required, for it questions the feasability of preventive measures for this population as well as the relationship between formal and informal support systems, considered optimal by government in their efforts to rationalize today's health care services. This article presents a conceptual framework enabling us to better understand the reasons why caregivers of the elderly seldom use formal support services, and discusses health, social and research implications.