To provide a battery capable of easily fixing a collector and a lead and having an excellent reliability of connection in a battery whose component of a collector is resin.

This bonding structure is the bonding structure between a collector 1 comprising a layer-like body consisted of a thin film P including resin and electron conductive thin films E1, E2 for holding active material or host material of electrodes in a battery and a lead 2 to electrically connect the collector 1 with a electrode terminal. The lead 2 is comprised of conductive adhesive 2a and metallic foil. The lead 2 is bonded to the collector 1 through the adhesive 2a.