METAL FOIL FOR NEGATIVE ELECTRODE COLLECTOR

The main object of the present invention is to provide a metal foil for a negative electrode collector, by which it is possible to achieve a lower resistance value. The present invention is directed to a metal foil for a negative electrode collector, which has a plurality of openings that reach a foil rear surface from a foil front surface and which has a region having a through hole density of 1000 holes/cm 2 or more.