To provide a building construction method where a joined part between a RC-made column and a S beam can be simply joined in a short work term using a through type long fastening bolt.

A beam joining steel pipe 3 which has a height enough to join a S beam 2 and a bolt hole 4 about similar to the sectional shape of a RC-made column 1 is formed, and the long unbonded fastening bolt 5 is inserted through the bolt hole 4 and piercedly provided in the beam joining steel pipe 3. The beam joining steel pipe 3 is arranged in the joined part of the column 1, and a column reinforcement is arranged around the column 1, and column forms are assembled, and concrete is placed in them for forming the RC-made column 1. A joining plate 7 with a bolt hole 8 is provided in the end of the S beam 2, which is set up between the RC-made columns 1, 1, and the long fastening bolt 5 is inserted through the bolt hole 8 of the joining plate 7 and fastened with a nut 9 on the joining plate 7.