ELECTRODE ASSEMBLY

A first electrode sheet includes a first portion located on an outermost side and serving as one turn around a winding axis, a second portion located inward of the first portion and serving as one turn around the winding axis, and a third portion located inward of the second portion and serving as one turn around the winding axis. Multiple holes includes a first hole provided in the first portion, a second hole provided in the second portion, and a third hole provided in the third portion. The second hole is located away from a first facing portion of the second portion that faces the first hole in a direction perpendicular to a surface of the first portion. The third hole is located away from a second facing portion of the third portion that faces the second hole in a direction perpendicular to a surface of the second portion.