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1. A power storage module comprising: an electrode laminate including a laminate of a plurality of bipolar electrodes each having a positive electrode active material layer on a first surface of a metal plate and having a negative electrode active material layer on a second surface of the metal plate and a negative terminal electrode having a negative electrode active material layer on a first surface of a metal plate and disposed on one end side of the laminate in a laminating direction; a sealing body provided to surround a side surface of the electrode laminate and sealing an internal space formed between electrodes adjacent to each other in the laminating direction; and an electrolytic solution containing an alkaline solution that is housed in the internal space, wherein surfaces of the metal plate of the negative terminal electrode are bonded to the sealing body, the sealing body comprises a first sealing portion welded to an edge of the metal plate of the negative terminal electrode and a second sealing portion welded to an edge of the first sealing portion, a first surplus space surrounded by the sealing body and the metal plate of the negative terminal electrode is present, the first sealing portion comprises a first resin portion bonded to the first surface of the metal plate of the negative terminal electrode and a second resin portion bonded to a second surface of the metal plate of the negative terminal electrode, the first resin portion and the second resin portion forms an integrally bonded body based on heat welding, and the first surplus space is separate from the internal space and sealed by the bonded body and the metal plate of the negative terminal electrode.
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