This invention aims to promote the effect of agitating a heating liquid supplied to a balloon for an ablation catheter with balloon, to rapidly unify the surface temperature of the balloon, to prevent air from remaining inside the ablation catheter with balloon and to enhance the heal safety utilizing the ablation catheter with balloon. This invention provides a shaft for an ablation catheter with a balloon, the shaft being made of a single tube having two lumens extending from a distal end to a proximal end wherein the first lumen is a lumen for guiding wire through a passage provided for the wire, while the second lumen is a lumen for supplying liquid for supplying liquid into the balloon of the ablation catheter with balloon.本發明之目的在於,提高供給至附有氣球之電燒導管的氣球之加熱用液體的攪拌效率,使氣球之表面溫度迅速達成均勻,及防止空氣殘留於附有氣球之電燒導管內,提高使用附有氣球之電燒導管的治療安全性。本發明者提供一種附有氣球之電燒導管用軸,係由單一管構成之附有氣球的電燒導管用軸,該附有氣球之電燒導管用軸具有從遠位端連通至近位端的二個導管腔,第1導管腔係用以使引導線通過而設置之引導線通過用導管腔,第2導管腔係用以將液體供給至附有氣球之電燒導管的氣球內而設置之液體供給用導管腔。2a...附有氣球之電燒導管用軸5a...引導線通過用導管腔6a...液體供給用導管腔8...引線9...溫度感測器用引線
