Polyvinyl chloride thermoplastic elastomer composition

A thermoplastic elastomer composition obtained by a process consisting essentially of simultaneously kneading and curing at a temperature from 140.degree.-200.degree. C., a mixture which comprises 100 parts by weight of a vinyl chloride resin, from 20-300 parts by weight of a powdery and partially pre-crosslinked copolymer of butadiene and acrylonitrile, from 25-200 parts by weight of a plasticizer, from 10-200 parts by weight of a filler and a curing agent for the rubber which cures the rubber at a temperature of from 140.degree.-220.degree. C., said composition having a tensile strength of at least 120 kg/cm.sup.2 and a rate of compression set of not greater than 40% after being compressed at a compression rate of 25% at a temperature of 70.degree. C. over a period of 22 hours and said composition being meltable by a roll set at a temperature of 190.degree. C.