To execute a desired bending piping by one or few kinds of couplings, by forming the coupling of a multipiping pipe in such a way that hard coupling members to which coupling leg grooves for extending flexible pipe bodies are outwardly opened, are integrally attached at both ends of a flexible coupling main body consisting of the same number of flexible pipe bodies as the multipiping pipes.

A flexible coupling main body 1 is formed by arranging in parallel two flexible pipe bodies 1a, 1a having the same length and diameter, and hard plastic coupling members 2, 2 are inserted and attached to both ends of the flexible pipe bodies 1a, 1a. The coupling members 2, 2 are equipped with two hard plastic connecting members 2a, 2a which are fixedly arranged through a circular bottom plate on the inward sides of the flexible pipe bodies 1a, la. On the outward sides of the flexible pipe bodies 1a, 1a, the coupling members 2, 2 are arranged, which are formed by equipping coupling leg grooves to which ends of two multipiping pipe are inserted, that is, circular coupling leg grooves 2a' arranged inside the periphery, and linear coupling legs 2b' formed by halving the circular coupling leg grooves 2a' so that the connecting members 2a, 2a can be arranged on both sides of the coupling members 2, 2. Both ends of two flexible pipe bodies 1a, 1a are inserted and attached to two connecting embers 2, 2.