Intragastric balloons are steadily gaining popularity among the medical treatments available for obesity. Their efficacy and safety are reinforced by growing body of evidence obtained around the globe. Intragastric balloons are now considered one of the safest and most effective medical procedures for weight reduction. Additionally, the reduced potential for side effects and low invasiveness (compared to bariatric surgeries) are important considerations. This book is edited by renowned surgeons and endoscopists from Brazil, a country known for its reputation on the field of bariatric endoscopy and surgery. Such reputation is especially valid where the use of intragastric balloons is concerned. These devices, approved by the FDA only in 2015, have been used in Brazil since the 1990s, attesting to Brazilian expertise in the field. This book describes the various types of intragastric balloons used for the treatment of obesity, an alternative to bariatric surgery and other more invasive methods. It addresses their indications, procedures and outcomes, providing readers an overview of the therapeutic options available worldwide. It is divided into seven main sections: I - Introductory Issues; II - Devices; III - Technical Procedures and Related Issues; IV - Acute Complications and Treatment; V - Chronic Complications and Treatment; VI - Special Populations; and VII - Miscellaneous. This structure helps to promote a better knowledge construction and a reasonable flow of ideas throughout the book, guiding the reader from introductory topics to surgical procedures and complications. The book ultimately intends to offer an essential reference guide for all physicians and surgeons interested in the treatment of obese patients. It is intended for both experienced professionals looking for in-depth information and for trainees and residents seeking to broaden their perspectives concerning the treatment of obesity.