Provided is a plasticizer composition, comprising: a cyclohexane-1,4-diester-based substance of the following Chemical Formula 1; an epoxidized alkyl ester composition comprising one or more compounds of the following Chemical Formula 2; and a citrate-based substance of the following Chemical Formula 3:






wherein in Chemical Formula 1 to Chemical Formula 3;
R1 and R2 each independently are a C8 alkyl group;
R3 is a C8 to C20 alkyl group comprising one or more epoxy groups; and
R4 to R7 each independently are a C4 to C10 alkyl group.