PROBLEM TO BE SOLVED: To provide a bioelectrode or gellatinous material heat-retaining and moisture-retaining container allowing a subject to comfortably fit a bioelectrode without any discomfort by resolving inconvenience caused by a temperature difference when the bioelectrode comes into contact with a subject.SOLUTION: The bioelectrode or gellatinous material heat-retaining and moisture-retaining container for stably retaining a part of the bioelectrode coming into contact with a living body or the gellatinous material coming into contact with the living body, includes: moisture-retaining means that retains in a wet state, an installation surface 131 with which at least the part of the bioelectrode comes into contact or the gellatinous material comes into contact and temperature adjusting means for retaining the installation surface 131 to a fixed temperature.
