PROBLEM TO BE SOLVED: To provide an electrode for acquiring a biological signal mounted on the ear that suppresses an adverse effect on hearing for a user, and suppresses a load while it is worn.SOLUTION: An electrode 10 for acquiring a biological signal includes: a clip body for sandwiching the head of a user with clip force from the ear auricle of the user or a peripheral part of the ear auricle and a wall of the external auditory meatus communicating with the ear auricle； a potential detection part 100 arranged at a part of the clip body that is inserted into the external auditory meatus, which is composed of a conductive body that comes in contact with the inner wall of the external auditory meatus； and a reference potential part 200 arranged at a part of the clip body that is not inserted into the auditory canal, which is composed of a conductive body that comes in contact with the ear auricle or a peripheral part of the ear auricle.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2020,JPO&INPIT【課題】ユーザにとっての聞こえへの悪影響及び装用中の負荷を抑えた耳に装着される生体信号取得用電極等を提供する。【解決手段】生体信号取得用電極１０は、ユーザの耳介又は耳介の周辺部と当該耳介から通じる外耳道の壁とから、クリップ力でユーザの頭部を挟むクリップ体と、クリップ体の外耳道に挿入される部分に配置され、外耳道の内壁と接触する導電体からなる電位検出部１００と、クリップ体の耳道に挿入されない部分に配置され、耳介又は耳介の周辺部と接触する導電体からなる基準電位部２００とを備える。【選択図】図６
