It is clear that body image plays a role in the etiology, development, and treatment of eating disorders and obesity. This work integrates research findings on body image with empirically supported assessment and intervention guidelines for anorexia nervosa, bulimia nervosa, binge eating disorder, and obesity. In addition, body image issues are explored in other areas such as cosmetic plastic surgery and body dismorphic disorder. The text covers physical and psychological diagnoses, treatment planning, and protocols for empirically supported intervention. How to decide which treatment to offer to which clients, how to combine body image modification techniques with interventions that can preserve life and health, and how to help clients change their behaviour, cognitions, and affects are illustrated with case examples, client handouts, and detailed protocols.