Based on the extensive historical sources and first of all on the statistical data, the article examines the history of migration of Koreans to the Russian Far East. Originally the Korean peasants migrated to the borderline territories of the Russian Far East and Manchuria where inhabitants of the Korean peninsular had had a long history of land cultivation. In the Russian Maritime provinces and neighboring regions the Korean settlers of the period under consideration appeared in the first half of 60-ies of the XIX century. The pre-revolutionary immigration to Russia underwent three stages in its development: 1863～1884; 1884～1905; 1905～1917, each of them was characterized by different volume, speed and character of migration and also by the policy of the tsarist Russia regarding the influx of the Korean migrants.