An endoscope system includes: a first endoscope including a first endoscope connector； a second endoscope including a second endoscope connector； an external apparatus including an apparatus-side receptacle to which the first endoscope connector and the second endoscope connector are connectable； and a converter including a plug connectable to the apparatus-side receptacle, a first receptacle to which the first endoscope connector is connectable, and a second receptacle to which the second endoscope connector is connectable.
