To support a ceiling carrying rod in a stable state by supporting and fixing the end part of the carrying rod of ceiling at the upper part of a carrying rod of ceiling support metal fitting fastened to a shape steel beam and having a fitting plate part extended along the web side face of a shape steel beam.

On the exterior wall 12 side, heat insulating material 13 and a member 14 for covering the exterior of the heat insulating material 13 are arranged on the opposite side side-face side of a web 1a of a shape steel beam 1 and jointed to the shape steel beam 1 using a joint hole of a horizontal plate 2c, and a carrying rod of ceiling support metal fitting 2 can be positively fixed by a fitting plate part 2a. On the building interior side, a joint hole of a vertical plate is used under the presence of a ceiling board 7 and a ceiling backing panel 6 formed by putting ceiling backing sash bars 5 together in grated shape at the lower face of a lower flange of the shape steel beam 1. The carrying rod of ceiling support metal fitting 2 is thereby jointed to the shaped steel beam 1 and positively fixed by the fitting plate part 2a so as to support a carrying rod 3 of ceiling stably. Stability of construction quality and constructing capability can therefore be improved.