Ethylene/α-olefin copolymer and film made thereof

An ethylene/α-olefin copolymer which is a copolymer of ethylene with an α-olefin having 3 to 20 carbon atoms;

• wherein the ethylene/α-olefin copolymer satisfies the following physical properties (a) to (d):
• (a) having a density of 0.900 to 0.965 g/cm3;
• (b) having a melt index, MI, at 190° C., under a 2.16 kg load, of 0.01 to 100 g/10 min;
• (c) in a chromatogram using a Rayleigh ratio obtained by extrapolating GPC-MALLS data at a scattering angle of 0°, showing an average value of Mc, {overscore (Mc)}, obtained by a five-point measurement method, of 0.5% or more and a standard deviation <σ> of an average of 35% or less;
• wherein Mc stands for a chromatographic area ratio of components having a molecular weight of 1,000,000 or more calculated on the basis of said five-point measurement;
• and
• (d) having a weight fraction, W30, of the portion eluted below 30° C. in a CFC measurement of 1% by weight or less.