It was performed a comparative analysis of treatment of 62 patients who were operated for morbid obesity. Patients were divided into 3 groups depending on kind of surgery: jejunal-iliac intestinal bypass, restrictive operations and combined operations. The complications in early postoperative period were diagnosed in 16.6% of patients after jejunal-iliac intestinal bypass and in 10% of patients after combined operations. Regardless of the kind of surgery there was rapid reduction of the body mass in the first year of observation with gradual increase of weight by an average of 5% in the subsequent period. The highest rate of weight loss by the second year was revealed after combined operations (up to 73.4%). Thus it was 1.1 times more than after jejunal-iliac intestinal bypass and 1.3 times more than after restrictive operations.