According to the American Society for Bariatric Surgery and the National Institutes of Health, Roux-en-Y gastric bypass is the most frequently performed weight loss surgery in the United States and is the gold standard procedure for weight loss surgery. The average excess weight loss after the Roux-en-Y procedure is generally higher in a compliant patient than with restrictive procedures like gastric banding and sleeve gastrectomy. In Roux-en-Y, the stomach is divided, and a small pouch, which limits calories that can be taken in on a daily basis to less than 1,000, is formed and at the same time majority of the stomach is sealed off. A portion of the small intestine is then divided and sewn to the newly created small proximal stomach pouch. This laparoscopic surgical process limits the body’s ability to absorb calories taken by patient. This procedure can be performed as a standard open surgery, or as a laparoscopic surgery. This presentation describe some of the important aspect of Laparoscopic Roux-en-Y gastric bypass surgery.