The purpose of the present invention is to provide an electrode catheter having an excellent torque transmitting performance compared to conventionally known electrode catheters. This electrode catheter is provided with a catheter shaft (10), ring-shaped electrodes (201-210), and conductive wires (301-310) for the ring-shaped electrodes (201-210). The catheter shaft (10) is configured from an inner tube (11) having a guide wire lumen (11L), and an outer tube (13) which forms a lumen (12L) through which the conductive wires (301-310) pass. The outer tube (13) comprises a braided tube reinforced with resin braids (135) along the entire length thereof. A distal section (101) of the catheter shaft (10) has side holes (15) in the wall of the outer tube (13), the side holes (15) being formed at positions corresponding to the positions at which the ring-shaped electrodes (201-210) are mounted. The conductive wires (301-310) enter the lumen (12L) through the side holes (15) and extend through the lumen (12L).以提供一種相較於先前技術所公知之電極導管而在轉矩傳導性上為優良的電極導管一事作為目的。本發明之電極導管,係具備有導管套筒(10)、和環狀電極(201~210)、以及環狀電極(201~210)之導線(301~310),而構成之,導管套筒(10),係藉由具備有導引鋼線管腔(11L)之內側管(11)、和形成用以插通導線(301~310)之管腔(12L)之外側管(13),而構成之,外側管(13),係由涵蓋其之全長而藉由樹脂製之編包(135)來作了補強的編包管所構成,在導管套筒(10)之前端部分(101)處的外側管(13)之管壁處,係與環狀電極(201~210)之裝著位置相對應地而被形成有側孔(15),導線(301~310),係從側孔(15)而進入管腔(12L)中並於該管腔(12L)中延伸存在。10‧‧‧導管套筒101A‧‧‧前端側低硬度區域11‧‧‧內側管111‧‧‧內層112‧‧‧外層11L‧‧‧導引鋼線管腔12L‧‧‧管腔13‧‧‧外側管131‧‧‧內層132、132a‧‧‧外層133‧‧‧補強層134‧‧‧樹脂135‧‧‧編包301、302、303‧‧‧導線
