A composite optical fiber cable has coated optical fibers and electric wires disposed inside a sheath. The optical fibers are enclosed within a first protective tube that is situated at the cross-sectional center, while the electric wires are disposed between the first protective tube and the sheath, and are capable of moving in the circumferential direction of the first protective tube. A composite optical fiber cable assembly includes a composite optical fiber cable and a connector attached to the cable. Inside the connector, a wiring portion for wiring the optical fiber to a ferrule and a wiring portion for wiring the electric wire to an electric terminal are disposed within a common space S inside a housing, and at least the wiring portion of the optical fiber which lies inside the space S is covered by a second protective tube.