To provide a dialysate-extracting apparatus in which a collecting port can be disinfected with no disinfecting work to be performed by a worker. A dialysate-extracting apparatus includes a dialysate-extracting device 1 having an introduction port 1a and a discharge port 1b each of which is connected to the flow route for liquid and allows the liquid to flow therethrough, and a collecting port 1c from which the liquid flowing in the flow route is collectable； and an opening-and-closing device 6 that is movable between a closing position where the opening-and-closing device 6 covers the collecting port 1c of the dialysate-extracting device 1 and an opening position where the opening-and-closing device 6 opens the collecting port 1c. The dialysate-extracting apparatus further includes an ultraviolet-applying device 7 attached to the opening-and-closing device 6 and that is capable of applying ultraviolet rays to the collecting port 1c when the opening-and-closing device 6 is at the closing position.
