ENDOSCOPE SYSTEM, AND ENDOSCOPE

摘要

In an endoscope that includes an insertion unit (2) having an observation window (15) and a treatment instrument channel opening (17) at its end surface, and an operating unit (3) provided at the proximal end of the insertion unit (2), an endoscope system includes a first endoscope (31) that includes a first objective optical system (33) having a predetermined viewing angle provided in the observation window (15), and a treatment instrument channel opening (17) positioned at a distance away from the observation window (15); and a second endoscope (32) that includes a second objective optical system (37) having an viewing angle wider than the viewing angle of the first objective optical system (33) provided in an observation window (15'), and a treatment instrument channel opening (17') positioned at a distance longer than the distance between the observation window (15) and the treatment instrument channel opening (17) of the first endoscope (31).