Education is one of the major activities of NCSR “Demokritos” from its establishment until today. The basic mission of the educational program of NCSR “Demokritos” is to provide a high level of education in postgraduate studies, professional training, continuing training and addresses graduates, students of all levels, specialized groups but also the wide public. The educational program of NCSR “Demokritos” is based on the important experience and knowledge of its human potential, in the latest developments of research in important sectors of natural sciences and technology as well as on the specialized, and in most cases unique infrastructure.