Objective — to study the results of endovenous laser obliteration (EVLO) for acute thrombophlebitis of saphenous veins of the lower extremities. Material and methods. There were 57 patients (39 (68%) men and 18 (32%) women), mean age of patients was 54±20 years (range 34—74) with acute ascending thrombophlebitis of varicose superficial veins of the lower extremities (type I and II). EVLO of great saphenous vein was performed in 48 cases, small saphenous vein — in 9 patients. All EVLO procedures were carried out in outpatient fashion without hospitalization to the hospital. Results. Complete obliteration of the target vein confirmed by ultrasound was observed in all patients the next day after surgery. Smooth course in long-term period (up to 1 year) was also noted in all patients. Recanalization of previously obliterated venous segment was absent. Conclusion. EVLO a safe and reliable alternative to traditional surgical approach for acute ascending thrombophlebitis. This technique is followed by reduced incidence of recurrent thrombophlebitis, no injuries typical for conventional surgery, minimal postoperative hospital-stay and pain syndrome. The procedure is characterized by minimal trauma, favorable cosmetic result and does not require hospitalization to specialized hospitals. EVLO for thrombophlebitis of varicose veins results high economic benefits due to minimally invasive simultaneous treatment of varicose veins and thrombophlebitis with small incidence of recurrences and complications.