The experience of subtotal colectomy in 20 patients as a method of treatment of left-sided obturation colonic ileus has been summarised. In 18 patients the operation was performed as an urgent procedure and in 2 patients it was less urgent. In 4 patients urgent subtotal colectomy was combined with resection of the other organs due to local spread of the tumor. In 4 patients complications developed in the early postoperative period, in 2 patients they were followed by urgent operation. There were 2 lethal outcomes due to decompensation of associated chronic cardio-vascular and pulmonary diseases. The authors suggest that subtotal colectomy in treatment of acute neoplastic colorectal obstruction could be used by surgeons of nonspecialized departments of urgent surgery provided that the competence of the surgeons is high enough and preoperative treatment is adequate.