The review deals with the problem of neuropsychological disorders in Parkinson's disease (PD), one of the most common neurodegenerative diseases in the world. A global search for foreign and Russian investigations in this topic in 2001 to 2016 has been carried out in the scientific databases Medline and Russian science citation index. Particular emphasis is laid on emotional, cognitive, and psychotic disorders that largely worsen quality of life and cause professional and social dysadaptation. The manifestations of and diagnostic criteria for impulsivecompulsive disorders in PD and the contribution of genetic and sociodemographic factors to their genesis are also depicted. Clinical neuropsychological assessment scales are assessed. Sleep disorders that are pathogenetically similar to neuropsychological disorders are characterized.