Power storage device

A power storage device comprising:

• a module stacked body including at least one power storage module including a plurality of stacked electrodes;
• and
• a housing constituting a first sealed space for accommodating the module stacked body,
• wherein the housing includes:
• a housing body including a cylindrical side wall extending-along a stacking direction of the module stacked body and a plate-shaped bottom wall closing one end of the side wall, and
• a lid closing the other end of the side wall, wherein the lid includes a plate-shaped central portion and a deformable portion formed on a peripheral edge of the central portion, and a plate thickness of the deformable portion is smaller than a plate thickness of the central portion, and
• the housing constrains the module stacked body in the stacking direction of the electrode inside the first sealed space by deforming at least a portion of the bottom wall and the lid of the housing, so that the bottom wall and the lid become closer to each other due to an air pressure difference between the inside and outside of the first sealed space.