To simplify wiring of a power line and a communication line and to facilitate a wiring work and reduce the cost.

This composite cable 10 comprises an optical fiber cable 11 for communication, a plurality of power source cables 12 aligned outside the optical fiber cable 11, and an outer coat 13 arranged outside the power source cables 12. The power source lines 12 are placed in parallel with the optical fiber cable 11 in the center, the gap therebetween is filled with a filler, and the power source line 12 has an oval cross-section.