<p>Background: The use of intrauterine devices (IUDs) for contraception has in-creased in many countries. However, their application has some serious compli-cations such as uterine perforation and injury to adjacent organs. The translo-cated IUD into the bladder is a very rare occurrence.<br /> Case Presentation: Our case was a 41-year-old woman whose IUD was acci-dentally discovered in her bladder during a routine ultrasound. The IUD has mi-grated from its normal position in the uterus to the bladder. The IUD was suc-cessfully removed by cystoscopy without any complications.<br /> Conclusion: The mislocation of an IUD in the bladder, while uncommon, is a possibility that should be considered when the IUD string is not visible during examinations.</p>