To provide a method for integrally preparing a braid structure having plural branched parts in the length direction by braiding.

Plural braid units 1, 2 and 3 forming branched parts are individually produced by a braider. After the preparation of the braid units, the mandrel of a main pipe part is extracted from each of the braid units. The main pipe part of each braid unit is inserted into a straight mandrel 11 and the straight mandrel 11 is connected to mandrels 6b, 6c, 7b and 8b of branch pipe parts of each braid unit by a proper means. The braid units are connected by the straight mandrel, respectively to form a conjugated braid. After the formation of the conjugated braid, the conjugated braid is subjected to integral braiding by using a braider. The objective braid structure having plural branched parts is thus obtained.