The insertion device includes a distal end member formed at the distal end portion of the insertion portion to be inserted into the subject, a tubular member arranged on the distal end member, a distal end member inserted into the distal end member, and a tube And an annular connecting ring sandwiching a part of the shape member.挿入機器は、被検体内に挿入される挿入部の先端部に形成される先端部材と、先端部材に配置される筒状部材と、内部に先端部材が挿入され、先端部材との間で筒状部材の一部を挟み込む環状の連結環と、を具備する。
