The present invention relates to a PBT elastomer composition having excellent heat resistance, and more particularly, to lower the hardness by mixing vegetable oil or an eco-friendly plasticizer in a PBT (polybutylene terephthalate) resin, and to lower the hardness, and to reduce the hardness of PET-G (Glycol modified polyethylene terephthalate) resin and It relates to a PBT elastomer composition having excellent heat resistance to improve heat resistance by mixing a plasticizer and a core-shell type copolymer (core-shell type copolymer) with excellent mixability and supplementing physical properties and processability with a thermoplastic polyester elastomer) resin. . A preferred embodiment of the present invention is made by mixing 10 to 120 parts by weight of an eco-friendly plasticizer and 10 to 120 parts by weight of a TPEE (Thermoplastic copolyester elastomers) resin, based on 100 parts by weight of a polybutylene terehpthalate (PBT) resin.
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