Polycarbonate (PC) and poly(butylene adipate-co-therephthalate)(PBAT) were melt blended using twin screw extruder. The phase morphology of PC/PBAT blends indicated a homogeneous structure by scanning electronic microscopy (SEM). Dynamic mechanical analysis revealed that there is shift of two tanδ toward each other. Especially, the both tanδpeaks closely approach each other in case of PC/PBAT (75/25). It is thought that this is attributed to transesterification occurred during the melt mixing. WAXD results showed that the intensity of crystalline diffraction peaks of PBAT decreased with an increase of PC contents in the blends.