Obesity surgery is one of the well-known risk factors for gallstones. Prolonged hunger and rapid weight loss cause decreased fluidity of bile and gallstones. The appearance of gallstones, which cause complaints after obesity surgery, is between 7-15%. In the abdominal ultrasound performed before obesity surgery, gall bladder stones are detected and if this stone has previously caused trouble to the person, gall bladder surgery is recommended in the same session. If the detected stone did not cause a problem, it is not recommended to perform it simultaneously with obesity surgery. When comparing gallbladder surgeries performed simultaneously with obesity surgery and surgeries performed only for gallstones, more complications occurred when two surgeries were performed simultaneously. If gall bladder stones develop after obesity surgery, it is recommended to remove the gallbladder by surgery.