To provide a series connection structure for electricity storage elements by limiting the length of a tubular battery and reduced in connection resistance.

A positive electrode body and a negative electrode body are wound while being separated by a separator to form an upper electricity storage element, a central electricity storage element and a lower electricity storage element and a plurality of the electricity storage element are connected in series to obtain the series connection structure 130 for the electricity storage elements. In the series connection structure 130 for the electricity storage elements, first and second current collecting foils two times as wide as a polarizable electrode 48 are prepared and arranged continuously to the adjacent electricity storage elements thus connecting the electricity storage elements in series. An intermediate region 132 of the first and second current collecting foils is subjected to water repellent treatment.