Abstract: An aspect of battery module includes a plurality of columnar batteries stored in storage unit of a high thermal conductivity. The storage unit includes base section, first frame sections, and second frame sections. The base section is a base member to which the first frame sections and the second frame sections are fixed. The first frame sections are hollow cylindrical members protruding on one main surface side of the base section. The second frame sections are hollow cylindrical members protruding on the other main surface side of the base section. The first frame sections and second frame sections are alternately arranged. A half of each battery is covered with each first frame section or each second frame section.