PROBLEM TO BE SOLVED: To insert an insertion tube into a body cavity of a corpse and to close the opening hole on the distal end side of the insertion tube during the insertion to make it difficult to inject a bodily fluid leakage preventive agent. Eliminating the problem of being caught on the body wall and making it difficult to insert, it can be easily inserted into body cavities such as the mouth, nose, and ears of the body without the need for skill Insertion for injection of body fluid leakage prevention agent with excellent operability Provide a tube. An insertion tube (20) used for injecting a bodily fluid leakage preventive agent (2) in an injector (10) into a body cavity of a body, and a front opening on a side surface of a distal end portion of a tube body (21) of the insertion tube (20). Holes 23a and 23b and rear side opening holes 23c and 23d are provided. The front-side opening holes 23a and 23b and the rear-side opening holes 23c and 23d are sequentially provided from the front end side of the pipe main body portion 21 so that the center positions of the front-side opening holes 23a and 23b are displaced in the axial direction of the pipe main body portion 21. , 23d are set to be smaller than the opening areas of the front opening holes 23a, 23b. [Selection diagram] Figure 1【課題】遺体の体腔内に挿入管を挿入する際、挿入途中において挿入管の先端側の開口孔が塞がれて体液漏出防止剤を注入し難くなるという問題や、挿入管の先端部が体壁に引っ掛かって挿入し難くなるという問題を解消し、遺体の口、鼻、耳などの体腔に熟練を要することなく簡単に挿入できる操作性に優れた遺体の体液漏出防止剤注入用の挿入管を提供する。【解決手段】注入器１０内の体液漏出防止剤２を遺体の体腔内に注入するために用いられる挿入管２０であって、挿入管２０の管本体部２１の先端部側面には、前側開口孔２３ａ、２３ｂ及び後側開口孔２３ｃ、２３ｄが設けられる。前側開口孔２３ａ、２３ｂと後側開口孔２３ｃ、２３ｄとは、各々の中心位置が管本体部２１の軸方向にずれるように管本体部２１の先端側から順に設けられ、後側開口孔２３ｃ、２３ｄの開口面積は、前側開口孔２３ａ、２３ｂの開口面積に比べて小さくなるように設定されている。【選択図】図１
