PROBLEM TO BE SOLVED: To provide a nerve stimulation electrode in which an adjustment operation of an electrode position in the time of indwelling is easy.SOLUTION: An electrode unit 2 performing electrical stimulation to a nerve by being indwelled in a living body includes an electrode part 38 having a stimulation electrode 34 which applies electrical stimulation to a nerve, and a lead part 35 for connecting an electrical stimulation device 20 which generates electrical stimulation and the electrode part. The lead part has a low friction part 51 which is provided in a tip side, and a high friction part 52 which is provided closer to a base end side than the low friction part and generates a larger friction than the low friction part.COPYRIGHT: (C)2016,JPO&INPIT【課題】留置時における電極位置の調整操作が容易な神経刺激電極を提供する。【解決手段】生体内に留置されて神経に電気刺激を行う電極ユニット2は、神経に電気刺激を印加する刺激電極34を有する電極部38と、電気刺激を発生する電気刺激装置20と電極部とを接続するリード部35とを備え、リード部は、先端側に設けられた低摩擦部51と、低摩擦部よりも基端側に設けられ、低摩擦部よりも大きい摩擦を生じさせる高摩擦部52とを有する。【選択図】図1