To obtain a resin composition which can give a lightweight film having excellent heat insulation properties and good transparency, tensile break resistance, and impact break resistance and being useful as an agricultural film by mixing an ethylene/α-olefin copolymer with an inorganic compound containing Si, Al, Mg, Ca, or the like.

This composition comprises 85-99 wt.% (A) ethylene/6C or higher α-olefin copolymer having the following properties: the melt flow rate is 0.01-10 g/10 min; when tested by temperature rising elution fractionation(TREF), it gives an elution curve in which at least one peak appears, the main peak stands at a temperature of 100°C or below, the eluate amount (Y: wt.% based on the entire copolymer) at 50°C in TREF satisfies the relationship: Y ≤-4,500 D+4,105 ≤100 (wherein D is the density of component A and is below 0.91 g/cm3) and the relationship: Y ≤10 (wherein D is 0.91 g/cm3 or above); and the content of the 6C or higher α-olefin is 2-60 wt.% and 15-1 wt.% (B) inorganic compound containing an atom selected among Si, Al, Mg, and Ca.