Laparoscopic sleeve gastrectomy (laparoscopic sleeve gastrectomy) is one of the methods used to treat morbid obesity. The basic approach is to laparoscopically remove the stomach longitudinally, so that the formerly enlarged stomach becomes like an intestinal tube. This reduces the volume of the stomach, allowing less food to enter and be digested and absorbed in the stomach. Most of the endocrine cells are also removed, and the appetite decreases after surgery, resulting in weight loss. Compared to the other two types of weight loss surgery, gastric sleeve resection is the least technically difficult, easiest and safest procedure. It has the least impact on postoperative nutrition. This procedure has been attempted by authors using a transumbilical approach and no visible scar on the abdominal wall is visible after surgery. According to the available literature, after gastric sleeve resection, 70% of excess body weight can be lost in the first postoperative year, an outcome similar to that of gastric diversion surgery, but without the complications of postoperative anemia, osteoporosis, and vitamin deficiencies after gastric diversion. The results of the 5-year follow-up literature showed no recurrence of obesity due to gastric re-expansion after gastric sleeve resection. As with other bariatric procedures, gastric sleeve resection has been shown to be effective in the treatment of type 2 diabetes and other obesity-related diseases.