We report a case of a 30-year-old woman, who had two previous caesarean sections, attended for the first time at 18 weeks of gestation. Pelvic ultrasonography and color Doppler imaging showed a placenta percreta invading the urinary bladder. A caesarean section was carried out at 27th week of gestation for preterm premature rupture of membranes. Placental tissue was firmly attached to the anterior surface of the bladder. A cesarean hysterectomy was performed with bilateral anterior internal iliac artery ligation before hysterectomy was finished. The bladder was repaired, leaving a suprapubic catheter.