To provide an efficient method or the like for manufacturing a beverage container having high-quality metallic vacuum double structure, to obtain a compact cylindrical vacuum layer for increasing capacity, and to achieve easy handling by using an inserting guide body having simple structure.

The lower part 12 of the inner bottle 1 is temporarily placed on the inserting guide body B, which has an outer diameter s equal to an outer diameter w of a cylindrical inner bottle 1 and includes an engaging part 6 for freely engaging with a lower part 12 of the cylindrical inner bottle 1. An cylindrical outer bottle 3 is inserted to an outer periphery 13 of the cylindrical inner bottle 1 temporarily placed on the inserting guide body B, and a lower end 31 of the cylindrical outer bottle 3 is fitted to an outer periphery 70 of the inserting guide body B and temporarily placed with a predetermined space p from the cylindrical inner bottle 1. Mouth parts 2 and 4 of both of the cylindrical bottles 1 and 3 are welded and then the inserting guide body B is removed. An intermediate bottom 50 is welded to the lower end 31 of the cylindrical outer bottle 3 and vacuum processing is performed. Thereafter, a bottom 5 is fitted to the lower end 31 of the cylindrical outer bottle 3.