The authors have studied a group of mental patients who have migrated to Moscow from various administrative areas of the Russian Federation. It has been established that the number of such patients over the last ten years has decreased by 11.6 per cent only. The authors present data on the nosological composition of the group of migrants and mental disturbances in each nosological group with which the migrational behaviour is associated. It has been demonstrated that the number of migrants from variable areas diminishes with a greater distance from Moscow; it is lower in those areas where the outpatient care is better exercised. The ways of preventing the migrational behaviour of mental patients have been outlined.
