By means of the method of solid state track detection of electrically charged alpha particles the concentration of radon was measured in lead and zinc mine, ''Stari Trg'' in Kosovska Mitrovica as well as in appartments of Pristina and its neighborhood. The concentration of radon in Stari Trg pit ranged from 50 Bq/m(3) to 1000 Bq/m(3). The concentration of radon in the appartments of Pristina was under 150 Bq/m(3), whereas its values in appartments of some other settlements and its neighborhood are ranging between 150 and 750 Bq/m(3).