An endoscope reprocessing apparatus has a calculation section and a control section. The calculation section determines whether a flow rate or pressure information is in a region in which the circulation conduit is determined to be clogged, of a region exceeding a predetermined threshold value and a region below the predetermined threshold value, and determines whether newest flow rate or pressure information has a correlation with a change-over-time prediction axis when the flow rate or pressure information is in the region in which the circulation conduit is determined to be clogged. The control section performs a first measure relating to removal of scale when it is determined that the flow rate or pressure information has a correlation with the change-over-time prediction axis, and performs a second measure different from removal of scale when it is determined that the flow rate or pressure information does not have the correlation.
