A brain wave detection bioelectrode capable of improving adhesion is provided. The brain wave detection bioelectrode includes: a holder part that includes a plurality of through holes； an electrode part that is formed of at least one conductive elastic body including a base part extending to an outer peripheral side of a peripheral surface of each of the through holes and including at least one projecting part that projects from the base part and can penetrate the through hole； and a lid part having a conductive property that clamps the base part between itself and the holder part.
