Battery module

A battery module is fabricated as follows. A plurality of elements (110) for electromotive force are accommodated in a one-piece cylindrical case (100) and are arranged in series in an axial direction of the case. The elements for electromotive force are electrically connected through an electric connector (120) passing through a resin partition wall (130) which separates the elements for electromotive force from one another. Both ends of the case are sealed with sealing plates (150).