According to an aspect of the present invention, provided is an optical composite cable which improves the mechanical properties of an optical fiber unit by forming a buffer unit where a polyester elastomer bilayer made of different materials is formed on the outer surface of the optical fiber unit. An optical composite cable to the embodiment of the present invention includes an optical fiber cable which includes an optical fiber unit having an optical fiber core line and a buffer unit which has a polyester elastomer bilayer of different materials to surround the optical fiber unit; a power cable which includes an electric conductor and an insulator covered with the electric conductor; a coating jacket which surrounds the outer part of the power cable and the optical fiber cable and forms an outer surface; a protective material which protects the optical fiber cable and the power cable; and a fabric shield conductor which is formed between the coating jacket and the protective material and protects the power cable from an effect due to the interference of a signal from an electromagnetic field.
