A polymer resin film having a plurality of through holes extending through the thickness of the polymer resin film, wherein the through holes penetrate a substrate structure of the resin film, the through holes have openings formed in both a first principal surface and a second principal surface of the film, the through holes have a shape in which the area of a cross-section perpendicular to a direction in which the through holes extend is constant from the first principal surface of the film to the second principal surface of the film or increases from the first principal surface toward the second principal surface, a variation in a porosity defined by the openings in the first principal surface is 10% or less, a standard deviation in the density (number/cm 2 ) of the openings in the first principal surface is 1000 openings/cm 2 or less, and the polymer resin film satisfies the following (a) and/or (b): (a) the openings in the first principal surface have a diameter of 15 μm or more and 80 μm or less; (b) the openings in the first principal surface have a diameter of 3 μm or more and 80 μm or less, and in both of the principal surfaces, the openings of the through holes are formed at positions corresponding to intersections of an imaginary grid defined on each of the principal surfaces, wherein the variation of porosity, the standard deviation and the openings' diameter are determined according to the description. the through holes penetrate a substrate structure of the resin film, the through holes have openings formed in both a first principal surface and a second principal surface of the film, the through holes have a shape in which the area of a cross-section perpendicular to a direction in which the through holes extend is constant from the first principal surface of the film to the second principal surface of the film or increases from the first principal surface toward the second principal surface, a variation in a porosity defined by the openings in the first principal surface is 10% or less, a standard deviation in the density (number/cm 2 ) of the openings in the first principal surface is 1000 openings/cm 2 or less, and the polymer resin film satisfies the following (a) and/or (b): (a) the openings in the first principal surface have a diameter of 15 μm or more and 80 μm or less; (b) the openings in the first principal surface have a diameter of 3 μm or more and 80 μm or less, and in both of the principal surfaces, the openings of the through holes are formed at positions corresponding to intersections of an imaginary grid defined on each of the principal surfaces, wherein the variation of porosity, the standard deviation and the openings' diameter are determined according to the description. (a) the openings in the first principal surface have a diameter of 15 μm or more and 80 μm or less; (b) the openings in the first principal surface have a diameter of 3 μm or more and 80 μm or less, and in both of the principal surfaces, the openings of the through holes are formed at positions corresponding to intersections of an imaginary grid defined on each of the principal surfaces, wherein the variation of porosity, the standard deviation and the openings' diameter are determined according to the description. <EOS>