To solve the problem that, when a bolt and a screw are mounted to a side face of a column, conventionally, drawing power is reduced by half and in the case where separate metal fittings are mounted when clamping a column, a foundation and a pedestal, the drawing power is reduced by half.

A joint column base metal fitting comprises a linear or L-shaped vertical part 11 and a horizontal part 12 drawn from one end or both ends of a lower portion of the vertical part horizontally in an L shape for a fixed length. The vertical part 11 includes a pin hole 2 for inserting a drift pin therein, and the horizontal part 12 includes a bolt hole 4 for clamping an anchor bolt. A column provided with a slit in the center of a lower part of the column is inserted into the vertical part, the column is placed on the pedestal, and the anchor bolt is inserted into the bolt hole of the horizontal part outside of the column, thereby fixing the column to the pedestal and a foundation.