RESTRAINT DEVICE

A restraint device includes an elastic member that is stacked with a power storage module in a Z direction, and an end plate that presses the elastic member toward the power storage module. The elastic member includes a first elastic portion and a second elastic portion that is softer than the first elastic portion. The first elastic portion is provided at a position that does not overlap a gas channel in the Z direction, and the second elastic portion is provided at a position that overlaps the gas channel in the Z direction.