The present invention relates to an ester-based plasticizer composition, a method for preparing the same and a resin composition comprising the same. The ester-based plasticizer composition according to one embodiment of the present invention is a novel terephthalate-based ester compound for a plasticizer prepared through transesterification. When the ester-based plasticizer composition is used in a resin composition, it is capable of providing excellent resistance for stress, and excellent physical properties such as migration resistance and volatility resistance as well as tensile strength and elongation rate.