PROBLEM TO BE SOLVED: To provide an electrode for brain wave measurement capable of securing conduction sufficiently by coming into contact with a scalp without using conductive paste, and measuring a brain wave with a high degree of precision while reducing a burden on a subject.SOLUTION: An electrode for brain wave measurement includes: an elastic support part 12 one or more elastically deformable protrusions 14 protruding from one surface of the support part 12 and a deformation promoting part 16 provided to at least part of the border between the support part 12 and the protrusions 14. The support part 12 and the protrusions 14 contain a nanocarbon material.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】導電性ペーストを用いずに頭皮と接触して導通を十分に確保できるとともに、被験者の負担を軽減し、高い精度で脳波を測定できる脳波測定用電極を提供する。【解決手段】弾性を有する支持部12、前記支持部12の一表面から突出した弾性変形可能な1または複数の突出部14、および、前記支持部12と前記突出部14との境界の少なくとも一部に設けられた変形促進部16を備え、前記支持部12および前記突出部14は、ナノ炭素材料を含むことを特徴とする。【選択図】図1