An object of the present invention is to provide a guide wire insertion means capable of smoothly moving a flexible sheath along a guide wire and easily inserting the flexible sheath into a bile duct. SOLUTION: A guide wire insertion means 70 is provided with a hollow distal tip fitting portion 70a into which the distal tip 6 is fitted, and a hollow cylindrical shape having a smaller outer diameter than the distal tip fitting portion 70a and having a distal end larger than the distal tip 6. And a guide wire insertion portion 70b protruding to the side. The guide wire insertion portion 70b has a hole 70c for inserting the guide wire 9 into the base end side peripheral surface, and a distal end side at a position symmetrical to the hole 70c in the circumferential direction. A groove 70d for passing the guide wire 9 on the peripheral surface, and the guide wire 9 is linearly penetrated from the hole 70c toward the groove 70d. [Selection diagram] FIG.【課題】可撓性シースをガイドワイヤに沿ってスムーズに移動させて胆管へ容易に挿入することができるガイドワイヤ挿通手段を提供すること。【解決手段】 ガイドワイヤ挿通手段７０を、先端チップ６が嵌め込まれる中空の先端チップ嵌合部７０ａと、該先端チップ嵌合部７０ａよりも外径が小さい中空円筒状且つ先端チップ６よりも先端側に突出するガイドワイヤ挿通部７０ｂとから構成し、ガイドワイヤ挿通部７０ｂが、基端側周面にガイドワイヤ９を挿通するための孔７０ｃと、孔７０ｃと周方向の対称位置の先端側周面にガイドワイヤ９を通すための溝７０ｄとを有し、ガイドワイヤ９を孔７０ｃから溝７０ｄに向かって直線状に貫通させることを特徴とするガイドワイヤ挿通手段。【選択図】図３
