The disclosed electrode catheter includes: a catheter body (10) a control handle (20) catheter tip-end sections (31, 32, 33, 34) and ring-shaped electrodes, a plurality of which being attached to each catheter tip-end section. One ring-shaped electrode (41B) attached to the first catheter tip-end section (31) and one ring-shaped electrode (42C) attached to the second catheter tip-end section (32) are broader in width than the other ring-shaped electrodes (41c, 42b, 43b, 43c, 44b, 44c). The ring-shaped electrodes (41B and 42C), which are broader in width, are arranged at different positions on the respective catheter tip-end sections to which the same are attached. With the disclosed electrode catheter, it is possible to easily find out which catheter tip-end section and which position thereon the electrode specified on an X-ray image is attached to.一種電極導管,具備:導管本體(10)、控制把手(20)、導管先端部(31,32,33,34)、及複數個被安裝於導管先端部的各個之輪狀電極;被安裝於第1導管先端部(31)的1個輪狀電極(41B)的電極寬幅,及被安裝於第2導管先端部(32)的1個輪狀電極(42C)的電極寬幅,比其他輪狀電極(41c,42b,43b,43c,44b,44c)的電極寬幅更寬,電極寬幅更寬的輪狀電極(41B)及輪狀電極(42C),各個被安裝的導管先端部之配置位置互為不同。根據此電極導管,在X線影像上特定的電極,於任何導管先端部,可以容易地辨認出是被安裝於哪個位置的電極。1...電極導管10...導管本體12...先端構件20...控制把手22...旋轉板31...第1導管先端部32...第2導管先端部33...第3導管先端部34...第4導管先端部312、322、332、342...覆蓋軟管41a...先端電極41B‧41c...輪(ring)狀電極42a...先端電極42b‧42C...輪(ring)狀電極43a...先端電極43b‧43c...輪狀電極44a...先端電極44b‧44c...輪狀電極