| 摘要 |
An endoscope system includes a first endoscope (31) and a second endoscope (32). The first endoscope (31) includes a first distal end portion (4), a first observation window (15) provided at the first distal end portion (4), a first objective optical system (33) optically coupled to the first observation window (15) and having a first viewing angle, and a first treatment instrument channel opening (17) positioned at a first distance away from the first observation window (15). The second endoscope (32) includes a second distal end portion (4'), a second observation window (15') provided at the second distal end portion (4'), a second objective optical system (37) optically coupled to the second observation window (15') and having a second viewing angle wider than the first viewing angle, and a second treatment instrument channel opening (17') positioned at a second distance longer than the first distance.
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