Power storage device

A power storage device comprising:

• a plurality of power storage modules stacked on top of each other,
• each of the plurality of power storage modules including
• an electrode stacked body including a plurality of electrodes stacked on top of each other, and
• a frame body having a shape that surrounds a periphery of the electrode stacked body and holding an edge portion of the electrode stacked body,
• the frame body having
• a pair of first frame portions facing each other and holding a portion of the edge portion of the electrode stacked body, and
• a pair of second frame portions extending in a direction intersecting the first frame portions and facing each other, and holding a remaining portion of the edge portion of the electrode stacked body,
• the pair of first frame portions including a liquid injection frame portion in which a liquid injection port for supplying an electrolyte solution to the electrode stacked body is formed,
• at least one of the pair of second frame portions having
• a second frame portion main body coupling the pair of first frame portions and having an upper surface and a lower surface,
• at least one protrusion provided in either one surface of the upper surface and the lower surface of the second frame portion main body, and
• at least one recess provided in the other surface of the upper surface and the lower surface of the second frame portion main body and having a shape fitted to the protrusion,
• the liquid injection frame portion having an upper surface and a lower surface, and parts that overlap with the liquid injection port in an up-down direction, of the upper surface and the lower surface, are formed flatly.