An endoscope cleaning/disinfecting apparatus 1 has a cleaning tank 8 in which an endoscope is disposed, a chemical tank 13 that stores a chemical solution, a water supply connecting portion 14 that is connectable to a water service pipe, an endoscope cleaning/disinfecting section 1A having a first conduit that connects the cleaning tank 8 and the chemical tank 13, and a second conduit that connects the cleaning tank 8 and the water supply connecting portion 14, an operation panel 7 that is a water information input section to which hardness information of water that is supplied from the water service pipe is inputted, a memory 61 that is a history information retaining section that retains contact of water and the chemical solution to the endoscope cleaning/disinfecting section 1A as cleaning history information, and a control section 52 that is a determination section that determines necessity or nonnecessity of scale removal of the endoscope cleaning/disinfecting section 1A based on the hardness information and the cleaning history information.
