This paper will deal with the conditions and indicators that bear witness to what is wiser to call a specific process of professionalization. This entails to cover details of the basically undisputed and empirically more tangible elements of professionalization such as long-term and full-time commitment to a career in politics, providing sufficient income and a certain position. But the special emphasis will be laid on aspects of the deputies’ work in their constituencies: This is the field about which least is known in parliamentary research. And: The way the MPs act there may turn out to be a driving force in the professionalization process