The holistic approach of building design in combination with the holistic approach of health and illness, that psychosomatic medicine suggests, were the basis of this dissertation. Its objective is to study the environmental design of a medical recovery and rehabilitation centre in the city of Volos. I am focusing on the architectural designing of its health facilities that have to satisfy the users' needs and on the other hand on the energy saving through an environmental (bioclimatic) design. My basic goal is that the environment -the spaces of the building- through their design will contribute in the "recovery" of the patients and will reflect a healthy image in their interior, by offering conditions of thermal comfort and quality natural lighting to the patients, as much as and in their exterior, by not being a burden to the environment.