To reduce high lift work when aerial wiring of a cable is performed, and to enable its construction to be done without using scaffoldings or an aerial vehicle.

A cable protecting pipe 14 is laid in the air in advance. A cable 24 is wired in the air by passing the cable 24 into the cable protecting pipe 14. As the cable protecting pipe 14, a plastic protective pipe body is used that is integrated with tension members vertically attached to its outside. Tension is applied to the tension members to install the pipe 14.