A brain wave detection bioelectrode capable of improving adhesion is provided. The brain wave detection bioelectrode (1) includes: a holder part (10) that includes a plurality of through holes (11)； an electrode part (20) that is formed of at least one conductive elastic body including a base part (21) extending to an outer peripheral side of a peripheral surface of each of the through holes (11) and including at least one projecting part (22) that projects from the base part (21) and can penetrate the through hole (11)； and a lid part (30) having a conductive property that clamps the base part (21) between itself and the holder part (10).
