An implantable electrode includes an outer tube, which has a distal end and a proximal end, wherein the implantable electrode is connectable in the region of the proximal end to an active device. At least one electrode line is arranged in the outer tube. At least one electrode pole, which is electrically connected to the at least one electrode line, for electrically contacting tissue surrounding the electrode in the implanted state of the electrode is arranged in the region of the distal end. A stub line for extending the electrical length of the at least one electrode line is connected to the at least one electrode line in the region of the distal end or the proximal end.
