An object is to provide an electrode catheter excellent in terms of torque transmission compared with a hitherto publicly known electrode catheter. An electrode catheter of the present invention comprises a catheter shaft 10； ring-shaped electrodes 201 to 210； and leads 301 to 310 of the ring-shaped electrodes 201 to 210, in which the catheter shaft 10 is constituted by an inside tube 11 that has a guide-wire lumen 11L and an outside tube 13 that forms a lumen 12L into which the leads 301 to 310 are inserted, the outside tube 13 being configured by a braided tube reinforced by a braid 135 made of a resin throughout the entire length thereof； in which side holes 15 are formed in the tube wall of the outside tube 13 at the distal end part 101 of the catheter shaft 10 in correspondence to the attachment positions of the ring-shaped electrodes 201 to 210； and in which the leads 301 to 310 enter the lumen 12L through the side holes 15 and extend in said lumen 12L.
