PROBLEM TO BE SOLVED: To provide a branch pipe which is connected to a tubular member, in which one of branching passages is a chemical solution circulation passage and the other is an insertion passage of an introduced object to a tubular member lumen, and which can easily incorporate the introduced object without damaging the introduced object at the time of incorporating the introduced object into the tubular member through the insertion passage.SOLUTION: A branch pipe which becomes a connection part with a tubular member having the tip introduced into the body, and in which a chemical solution passage and an insertion passage of an introduced member are formed by branching a lumen from the tip side to the base end side is configured that a plurality of rows of recessed surfaces 1112 and projection surfaces 1111 are alternately provided in the axial direction in the entire part or a portion of the insertion passage of the introduced member, the protrusion surface is made to be a contact part with the introduced member and the recessed surface is made to be a non-contact part. The insertion passage of the introduced member includes: a first inner diameter portion 1110 which is set to the branch part side a second inner diameter portion 1120 which is set to the opening side and is formed to be a larger diameter than the first inner diameter portion and a tapered portion 1130 which connects the first and second inner diameter portions.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】管状部材に接続して用いる、分岐する通路の一方を薬液流通通路とし、他方を管状部材内腔への導入物の挿通通路とした分岐管において、挿通通路を通して管状部材内へ導入物を組み込みのさいに、該導入物を破損することなく、容易に組み込むことができる分岐管を提供すること。【解決手段】先端部が体内に導入される管状部材との接続部となり、内腔を先端側から基端側に向け分岐する薬液通路と導入部材の挿通通路とした分岐管であって、前記導入部材の挿通通路の全部あるいは一部に軸方向に複数列形成する凹部面1112及び凸部面1111を交互に設け、凸部面を導入部材との接触部、凹部面を非接触部とした。また、前記導入部材の挿通通路は、分岐部側に設定する第一の内径部分1110、開口部側に設定する第一の内径部分より大きな径に形成される第二の内径部分1120、及び、第一、第二の内径部分をつなぐテーパー部分1130より構成した。【選択図】図2
