It designates that the lacrimal duct interpolation tube instrument which can manipulate without offering the lacrimal duct interpolation tube instrument which is optimized on the basis of the structure of the lacrimal duct and impairing the functional effect of the lacrimal duct endoscope, is offered as topic. As for the lacrimal duct interpolation tube instrument of this invention, being the lacrimal duct interpolation tube instrument which has the tube of one body which is detained inside the lacrimal duct, the opening to be formed by the both ends of the tube of aforementioned one body, in the aforementioned opening, the additional strength body to be laid out and containment in the vicinity, layout position of the said additional strength body becomes specified distance from the aforementioned opening.< Choice figure >Drawing 3 (a)涙道の構造に基づき最適化した涙道内挿管器具を提供すること、涙道内視鏡の機能効果を損なうことなく、操作することができる涙道内挿管器具を提供することを課題とする。本発明の涙道内挿管器具は、涙道内に留置される一体のチューブを備える涙道内挿管器具であって、前記一体のチューブの両末端には開口部が形成されており、前記開口部には、その近傍に補強体が配置保持されており、該補強体の配置位置が前記開口部から所定距離となる。【選択図】図3(a)
