Soft resin compositions comprising a polyethylene resin (A) and an ethylene/-olefin random copolymer (B) comprising ethylene and an -olefin having 3 to 20 carbon atoms at a specific proportion, or an ethylene/-olefin copolymer resin composition comprising a linear ethylene/-olefin copolymer (A-) comprising ethylene and an -olefin having 4 to 20 carbon atoms and a long-chain branched ethylene/-olefin random copolymer (B-) comprising ethylene and an -olefin having 3 to 20 carbon atoms in a specific proportion, wherein a density and MFR of the polyethylene resin (A) and the copolymer (A-), and a density, MFR, intrinsic viscosity, glass transition temperature crystallinity, molecular weight distribution, B value and g* values of the copolymers (B) and (B-) are each in a specific range.