The intensity of migratory flows is an indisputable reality in global level. Many countries around the world have become recipients of migrant population. The incentives for the movement of these populations are abundant: economic inequalities, social-political turmoil and others environmental disasters. Our country, like other European countries, has not stayed intact from this dynamic migratory landscape. The purpose of this work is to analyze and present the phenomenon of irregular immigration and to document the existing situation concerning the numbers, the legal status, the working status and activities of the illegal immigrants.