In addition to being an aesthetic problem, obesity is mainly a health problem and if left untreated, it causes high blood pressure, diabetes, heart failure, joint diseases and psychological disorders. Long-term use of drugs used in the treatment of obesity creates problems because of their side effects. The attenuating gastric balloon system (placement of a balloon in the stomach) is an effective method of weight loss that is increasingly preferred in the treatment of obesity. Thanks to this method, stomach reduction surgeries called bariatric surgery have begun to be abandoned in many centers. The method can be easily applied by an experienced gastroenterologist using only an endoscope without requiring any surgical intervention. This method is particularly suitable for patients in whom surgery is at risk due to obesity and other accompanying diseases. Since the balloon in the stomach takes up space in the stomach, it gives a feeling of early satiety and satiety, causing the patient to consume less food and thus lose weight. When adequate weight loss is achieved, usually no longer than 6 months, the balloon is deflated via the endoscope and removed from the stomach. Weight loss after 6 months of follow-up is different for each patient and can range from 15kg to 80kg.