For the purpose of the experimental investigation of Fluids engineering, wind tunnel has manufactured at Gas Turbine Laboratry in Oshima National College of Maritime Technology. From the measurements of the mean velocity in section at contraction exit and the static pressure distribution in the boundary layer at the center section on the measuring plate,the wind tunnel performance was examined. From these results,it was clear that the present wind tunnel might be used at range of wind speed that about 0 to 20m/s(where unit Reynolds number is 1.24×106m-1).