This book is a resource for early childhood professionals—whether in the health, social services, or education sectors—who wish to undertake initiatives that combine health promotion with parenting support. It may also be useful for parents who wish to get involved in such projects. It offers insights into the societal context and its evolution, reviews the scientific literature, and presents initiatives, professional practices, an intervention methodology, and practical tools. Developing a comprehensive approach to health promotion and parenting support requires identifying and taking into account the various levels of influence—both proximal and distal—on the parent-child relationship. The chosen approach is based on the socio-ecological model and encourages the development of intersectoral projects best suited to helping reduce social health inequalities starting in early childhood.