Intrauterine contraceptive devices have been in use for more than 30 years. Although perforation of the uterus by an intrauterine device is not uncommon, intravesical migration with secondary stone formation is a rare complication. A 46-year-old women is described in whom intravesical migration of the intrauterine device was complicated by bladder stone formation. Endoscopic management was applied with an excellent outcome. Copyright 2009 S. Karger AG, Basel.