POWER STORAGE ELEMENT

A power storage element comprises a negative electrode that includes a first conductor having a first surface and a second surface opposite to the first surface; a first active material layer provided on the first surface of the first conductor and configured to contain a plurality of first negative-electrode active material particles; and a first layer containing an inorganic material and including a first part provided across two or more of the first negative-electrode active material particles exposed on an opposite side of the first conductor, and a second part penetrating between the first negative-electrode active material particles of the first active material layer from the first part.