Polylactic acid (PLA) has attracted a lot of attention in recent years because of its good properties such as high transparency, high tensile strength and excellent biodegradability. However, high modulus and low strain slow down development of applications such as packaging. To overcome this limitation, PLA is mixed with various ethylene vinyl acetate (EVA) content (0-90% by weight) in absence and in presence of acetyl tributyl citrate (ATBC). The dynamical mechanical analysis (DMA) and thermal properties measured by differential scanning calorimetry (DSC) and thermogravimetry analysis (TGA) are fully investigated. By using scanning electron microscopy (SEM), it is demonstrated that ATBC increases the miscibility of PLA/EVA blends.