POWER STORAGE DEVICE

A power storage device includes an electrode body, an electrode terminal connected to the electrode body, and an exterior body that seals the electrode body. The exterior body is configured from a film-like exterior member and includes a first sealing portion joined to the exterior member in a state where the exterior member envelops the electrode body. The exterior member includes a barrier layer. The power storage device has a resin film for a power storage device disposed at least partially inwards of the barrier layer. The resin film for a power storage device includes at least one among a water absorbent and a gas absorbent.