| 摘要 |
In this invention, an attachment for changing a view angle and visual field direction or protecting a tip portion and others is removably fitted to a tip portion of an endoscope inserting portion. A connecting member pulling in and fixing this attachment is rotatably and nonremovably fitted on the outer periphery of the tip portion of the endoscope inserting portion. In order that this connecting member may not be pulled out of the tip portion of the endoscope inserting portion, a groove is peripherally formed on the outer periphery of the tip portion and engaging members engaging in this groove and having an elastic deformability are provided on the connecting member.
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