Biological electrode

This biological electrode is provided with: a substrate plate having a plurality of through-holes separated from each other; a plurality of electrode portions; and a fixing plate attached to the protruding portion of the connection terminal. Each of the electrode portions includes a cover layer, a conductive connection terminal penetrating the cover layer, and a conductive gel layer electrically connected to the connection terminal and in contact with a living body, the connection terminal includes a protruding portion protruding from the cover layer, and the protruding portion penetrates one of the plurality of through holes of the substrate. The size of the plurality of through holes of the base plate is smaller than the size of the fixing plate, and the protruding parts of the connecting terminals can be inserted into the through holes. 生物体电极具备：基材板，其具有相互分离的多个通孔；多个电极部分；以及固定用板，其装配于连接端子的突出部。各电极部分具备覆盖层、贯穿覆盖层的导电性的连接端子、以及与连接端子电连接且与生物体接触的导电性凝胶层，连接端子具备从覆盖层突出的突出部，突出部贯穿基材板的多个通孔中的一个通孔。基材板的多个通孔的大小为能够供连接端子的突出部插入的大小，且小于