PROBLEM TO BE SOLVED: To provide a fallopian tube narrowed part improvement tool which can easily reach the ostium of the fallopian tube, and in which an insertion operation is easy, capable of excellently improving the fallopian tube having a narrowed part.SOLUTION: A fallopian tube narrowed part improvement tool 1 includes a flexible outer tube 2 and an internal insertion body 3. The flexible outer tube 2 includes a hollow tube body 20 provided with a small diameter part 22 for insertion into the fallopian tube, and an outer tube hub 40. The internal insertion body 3 includes a tubular body 31, a coil-like tubular member 34 whose tip side protrudes from the tip part of the tubular body 31, a tip swollen part 38 in contact with the tip of the coil-like tubular member, and a linear member 35 including a linear part 37 inserted into the coil-like tubular member from the tip swollen part, whose base end part is fixed to the tubular body. The internal insertion body 3 is slidable from a state in which the coil-like tubular member protrudes from the tip of the flexible outer tube 2 to a state in which the entire coil-like tubular member 34 of the internal insertion body 3 is stored in the flexible outer tube 2.SELECTED DRAWING: Figure 1【課題】 卵管口への到達および挿入操作が容易であり、かつ、狭窄部を有する卵管を良好に改善することができる卵管狭窄部改善具を提供する。【解決手段】 卵管狭窄部改善具１は、可撓性外管２と内部挿通体３とからなる。可撓性外管２は、卵管内挿入用小径部２２を備える中空のチューブ本体２０と、外管ハブ４０を備える。内部挿通体３は、管状体３１と、先端側が管状体３１の先端部より突出したコイル状管状部材３４と、コイル状管状部材の先端と当接した先端膨出部３８と、先端膨出部よりコイル状管状部材内を挿通し、基端部が管状体に固定された線状部３７とを有する線状部材３５を備える。内部挿通体３は、コイル状管状部材が可撓性外管２の先端より突出する状態から、内部挿通体３のコイル状管状部材３４の全体が可撓性外管２内に収納された状態まで摺動可能である。【選択図】図１
