The endoscope reprocessor includes an endoscope information reading unit that reads endoscope information from the endoscope, a processing tank in which the endoscope is disposed, and the number of endoscopes disposed in the processing tank A number detection section, a first number which is the number of endoscopes read by the endoscope information reading section, and a second number which is the number of endoscopes detected by the number detection section are the same or different A determination unit connected to the determination unit and the notification unit to determine whether or not the first number and the second number are different from each other when the determination unit determines that the first number is different from the second number, And a control unit that drives the notification unit.内視鏡リプロセッサは、内視鏡から内視鏡情報を読み取る内視鏡情報読取部と、内視鏡を配置する処理槽と、前記処理槽に配置された内視鏡の本数を検知する本数検知部と、前記内視鏡情報読取部が読み取った内視鏡の本数である第1本数と、前記本数検知部が検知した内視鏡の本数である第2本数とが同じか異なるかを判定する判定部と、エラーを報知する報知部と、前記判定部および前記報知部に接続されて、前記第1本数と、前記第2本数とが異なると前記判定部が判定した場合に、前記報知部を駆動する制御部と、を含む。