To provide a double piping device capable of easily replacing an inside piping, ensuring thermal insulation efficiency of the inside piping without requiring any separate thermal-insulating execution and preventing the condensation therein.

A double piping device is equipped with an outside piping 1 for guiding and an inside piping 2 inserted into the outside piping 1. The inside piping 2 and outside piping 1 are formed of flexible resin. A bearing member 1A for bearing the inside piping 2 on the center section of the outside piping 1 is provided between the outside piping 1 and inside piping 2.