RESTRAINING MEMBER AND POWER STORAGE DEVICE

A restraining member includes a pair of interposing portions, a plurality of pressurizing portions, and a pair of pressing portions. Each pressurizing portion has the shape of which a dimension in a third direction perpendicular to both a first direction and a second direction is longer than a dimension in the first direction and a dimension in the second direction and is in contact with the interposing portion and the pressing portion. Each interposing portion includes a pressurized area overlapping each pressurizing portion in the first direction and a low pressurized area not overlapping the pressurizing portion in the first direction.