Obesity is a common chronic condition and one of the most serious public health problem of the 21st century. The main treatment of the obesity consist of low-calorie diet, increase of physical activity, behavioral therapy, pharmacotherapy and bariatric surgery. The intragastric balloon system is new, interesting therapeutic method with minimal risk of major complications. It is efficient in reducing weight in patients with serious obesity and recommended as a weight reducing adjuvant therapy before bariatric surgery.