PURPOSE: To easily construct a prefabricated multipipeline by burying plural pipings laid one upon another and in parallel in an almost rectangular concrete molding and also burying iron bars whose both ends are threaded in the four corners of the concrete molding.

CONSTITUTION: In the construction work of prefabricated multipipeline through which electric power distributing lines, communication lines, waterworks, sewage, gas pipes, etc., are placed under the ground, a plurality of pipings 2a, 2b, and 2c are formed vartically in parallel in an almost rectangular concrete molding 1, iron bars are buried in parallel with said pipings in both upper and lower side edges or the center of said concrete molding 1, the corners of said concrete molding are cut off to form cut portions 4a, 4a', 4b, 4b', 5, and 5', and then threads are formed on the iron bars exposed to the air. Then, the concrete moldings 1 are connected to eath other to form a prefabricated multipipeline.