Progressive chronic disorder, initially considered as being represented by dopaminergic neuronal loss, with predominantly motor symptoms, nowadays on the basis of modern technologies and procedures of diagnosis, the symptomatology extended by associating other different symptoms, many times being atypical, cognitive symptoms. Determining the diagnosis and framing it in a certain type of Parkinson’s disease is not a very easy task and requires an interdepartmental complex study of the patient. The present work reviews the main elements which define this medical disorder and presents some epidemiological information at the level of Iasi county in order to outline an image on the impact and the incidence which the problem of Parkinson’s disease has today.