Since January 2005 till December 2013 655 patients with morbid obesity were operated on, 457 (69,7%) from which, had gastric banding with using different models of regulating bandages: AMI (AMI, Austria), SAGB (Ethicon, USA), Lap Band (ALLEGRAN, USA). Gastric bypass was made to 198 patients, that made 30,3%. The degree of lowering of overweight in general is more after gastric bypass, than after gastric banding. At the same time during the period of 1–1,5 year the degree of lowering of overweight with women is the same after both the operation. The degree of lowering of overweight with men after gastric bypass is a little higher. In the period of 2–4 years the degree of lowering of overweight both with men and women after gastric bypass is higher. In 5 years men after gastric bypass actually lose weight better than after gastric banding. The men older than 40 years having BMI more than 40 kg/m2 after gastric banding lose weight worst of all. In the period of more than 5 years the women in the age group of 30–39 years having BMI more than 40 kg/m2 had better results after gastric bypass. The women older than 50 years having BMI more than 40 kg/m2 after gastric banding had the worst results.