An endoscope reprocessor according to the present invention includes a processing tank that houses an endoscope, a processing tank temperature measuring unit that measures the temperature of the liquid in the processing tank, a chemical tank that stores chemical liquid, and an inside of the chemical liquid tank A heating unit for heating the chemical solution, a first transfer unit for transferring a part of the chemical solution from the chemical solution tank to the treatment tank, and a second for transferring the chemical solution in the treatment tank to the chemical solution tank. When the measurement result by the transfer unit and the treatment tank temperature measurement unit is lower than a predetermined threshold, at least one of the chemical solutions stored in the treatment tank by controlling the first transfer unit and the second transfer unit. A controller that replaces the part with the chemical liquid remaining in the chemical tank. 本発明の内視鏡リプロセッサは、内視鏡を収容する処理槽と、前記処理槽内の液体の温度を測定する処理槽温度測定部と、薬液を貯留する薬液タンクと、前記薬液タンク内部の前記薬液を加温する加温部と、前記薬液の一部を前記薬液タンクから前記処理槽に移送する第１移送部と、前記処理槽内の前記薬液を前記薬液タンクに移送する第２移送部と、前記処理槽温度測定部による測定結果が所定の閾値よりも低い場合、前記第１移送部および前記第２移送部を制御して前記処理槽に貯留された前記薬液のうち少なくとも一部を前記薬液タンクに残留している前記薬液と置き換える制御部と、を含む。
