The present invention relates to a resin material for an electrical insulating material, an electrical insulating material and
electric wire and cable using the same. A resin material for an electrical insulating material according to present invention is characterized in that the resin component thereof comprises an
ethylene alpha-olefin
copolymer (A) which satisfies specific conditions, such as a density of 0.92~0.96 g / cm3, a melt flow rate (MFR) of 0.01~200 g / 10 minutes, a molecular
weight distribution (Mw / Mn) of 1.5~5.0, and possessing only one peak in terms of the number of peaks observed in an
elution temperature-eluted amount curve as measured by the temperature raising
elution fractionation (TREF) method, etc., wherein said resin component contains a unit derived from at least one type of
monomer selected from among a carbonyl or carbonyl derivative group-containing
monomer, a hydroxyl group-containing
monomer, a nitro group-containing monomer, a
nitrile group-containing monomer, an aromatic ring-containing monomer, and a compound or monomer containing two or more ethylenic linkages. This resin material for an electrical insulating material is suitable for use in an electrical insulating material for an
electric wire and cable, as it exhibits excellent processability and electrical insulating properties without degradation of the
mechanical strength, and even after cross-linking, exhibits superior electrical insulating properties.