Abstract: A body electrode holder includes a holding member to be disposed on an outer surface of a living body, and a plurality of perforations formed in predetermined positions of the holding member, through which perforations a plurality of body electrodes pass respectively, the holding member being formed of a sheet material. The predetermined positions correspond to portions of the living body in which portions bioelectricity is to be measured. The body electrode holder makes it possible to a plurality of body electrodes at once and easily to predetermined positions without requiring special technic or knowledge regarding positions to attach the body electrodes.