The damage of corrosion at lateral bracings and sway bracings has been reported and some of them are serious damage. Stainless steel has high corrosion resistance. Therefore, by applying stainless steel to such members, it is expected that the maintenance cost for corrosion can be reduced. In order to use stainless steel for lateral bracings and sway bracings, it is necessary to grasp the buckling strength. However, there are insufficient data of stainless steel compared with the conventional steel. Therefore, the compression test on the stainless steel column was conducted in this study. The test specimen was designed based on the investigation of the configurations of lateral bracings and sway bracings in actual existing steel bridges. The experimental results show the displacement of the column was increased rapidly and the slippage in bolted connection was observed after the maximum load. The test results were compared with the ultimate strength curve described in "Specifications for Highway Bridges" in Japan. The result indicates the possibility that the buckling strength of the stainless steel column can be evaluated by ultimate strength curve in the current design specifications.