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Background and aim: A wide variety of foreign bodies have been found in the urinary bladder, most often due to self-introduction and autoerotism, or iatrogenically introduced during surgery in the anatomic region. We report the first case of a gastric banding clip found in the urinary bladder. Case presentation: We describe the case of a 33-year-old Chinese female who had previously undergone gastric banding and subsequent removal of the band. She presented with lower urinary tract symptoms which followed a diurnal pattern, and investigations revealed a portion of a gastric banding clip in the urinary bladder. There was no sign of perforation or erosion of the bladder. The clip was surgically removed and the patient recovered without complications. Discussion and conclusion: This is the first reported case of an intraperitoneal gastric banding clip migrating extraperitoneally into the urinary bladder. The use of the urinary bladder to expel foreign bodies has been documented in other vertebrates, and the mechanism by which this occurs without perforation or erosion of the urinary bladder warrants further investigation.