This paper describes the medical services at Champ~Dollon Remand Prison in Geneva, and raises issues which relate to the consent of patients and the independence of doctors. Aseries of situations are presented, describing the relations of prison doctors with administrative and judicial authorities, and with the patients themselves. Prison medicine provides useful examples for the teaching of medical ethics. Preventive et Sociale 30, 312-321. ZIMMERMANN, E. (1988) Attentes et realite des soutiens pendant la detention preventive a la prison genevoise de Champ-Dollon. Deviance et Societf 12, 361-380.