In one execution form, the endoscope, extending from the substance, and the substance long and narrow the shaft which it ends in the point and, long and narrow has with the 1st mooring arrangement and the extending coming out possible 2nd mooring arrangement which are locked to the shaft long and narrow from the shaft. In one execution form, the endoscope advance device in order the 1st mooring arrangement which is locked long and narrow to the shaft of the endoscope and, it is long from the shaft to become the extending coming out possible in axial direction, has with the installation and others re ru 2nd mooring arrangement long and narrow on opposite side of the shaft.一実施形態において、内視鏡は、本体と、本体から延びて先端部で終わる細長シャフトと、細長シャフトに固定される第1の繋留装置と、細長シャフトから延出可能な第2の繋留装置とを備える。一実施形態において、内視鏡前進装置は、内視鏡の細長シャフトに固定される第1の繋留装置と、細長シャフトから軸方向に延出可能となるように細長シャフトの反対側に取り付けられる第2の繋留装置とを備える。
