An objective of the present invention is to provide a balloon ablation catheter such that even when the catheter shaft is heated by means of high-frequency waves, the catheter shaft will not lengthen to an extent that would hamper usage of the balloon ablation catheter, and such that the risk of an operator or patient being burned by heating of a reinforcement wire within the catheter shaft is significantly reduced. The present invention provides a balloon ablation catheter comprising a catheter shaft with a reinforcement wire embedded in the thickness part thereof, a balloon which is attached to an end part of the catheter shaft, and an electrode for high frequency wave energization which is disposed within the balloon, wherein L > t is satisfied where L is the shortest distance from the surface of the reinforcement wire to the surface of the catheter shaft, and t is the thickness of the thinnest portion of the balloon skin.本發明之目的在於,提供一種附有氣球之電燒導管,即使於藉由高頻將導管軸加熱之情況下,仍不會產生對附有氣球之電燒導管的使用產生不利之程度的伸長,從而可極大地降低因將導管軸內之補強線加熱而引起的手術醫師及患者之燙傷的風險。本發明提供一種附有氣球之電燒導管,其具備:導管軸,其於壁厚部內置有補強線;氣球,其附設於該導管軸之端部;及高頻通電用電極,其配置於該氣球之內部;且於將自該補強線之表面至該導管軸的表面為止之最短距離設為L,將該氣球之最薄部分的膜厚設為t之情況下,成為L>t。1‧‧‧附有氣球之電燒導管2‧‧‧氣球3‧‧‧外筒軸4‧‧‧補強線5‧‧‧電極6‧‧‧內筒軸7‧‧‧電線8‧‧‧溫度感測器用電線
