In this paper we review the possibilities and limitations of hypnotherapeutic techniques in the treatment of obesity. In spite of some promising reports, the findings and opinions about the effectiveness of hypnosis in the treatment of obesity vary greatly. We provide a brief overview of specific hypnotherapeutic techniques--such as teaching relaxation, increasing self-control, encouraging physical exercise, altering self-esteem and body image, strengthening motivation, and exploring ambivalence for change--that can be involved in a multidimensional approach to obesity. Case reports illustrate the use of these techniques.