The textbook presents psychological knowledge for health promotion at the intersection of medicine, sociology, and education. Experts from research, teaching, and practice provide a comprehensive insight into the relevance and practical implementation of psychological models and a psychological perspective on health and health promotion in interdisciplinary and multidisciplinary contexts. Starting from a modern bio-psycho-social understanding of health, it explores a wide range of settings, age-specific topics, and health conditions and disorders, taking into account different forms of health promotion and prevention. The textbook offers central psychological concepts and models for understanding health and health behavior, as well as health psychology concepts, methods, and interventions.