An endoscope reprocessor of the present invention includes: a fluid supply unit that supplies a fluid a fluid supply pipe line, which is connected to the fluid supply unit, and has an opening opened to the atmosphere a first valve that is disposed to the fluid supply pipe line a second valve that is disposed to the fluid supply pipe line, said second valve being on the side further toward the opening than the first valve a treatment tank in which an endoscope is to be disposed a first connector and a second connector, which are provided to the treatment tank a first pipe line that connects the first connector and a pipe line portion between the first valve and the fluid supply unit to each other a second pipe line that connects the second connector and a pipe line portion between the first valve and the second valve to each other and a pressure sensor that measures pressure between the first valve of the fluid supply pipe line, and the fluid supply unit.
