It is usually difficult to confirm a diagnosis of placenta accreta in a pregnant woman before delivery. During labor (with a natural birth or Cesarean section), postpartum hemorrhage may be encountered. If the obstetrician is not sufficiently experienced with placenta accreta patients or the anesthetic staff is not well prepared for a blood transfusion during the operation, the patient may die of hemorrhagic shock. Herein, we report a case of placenta accreta and previa during a cesarean section with massive blood loss of 9500 ml. A hysterectomy was finally performed and the patient was well postoperatively.