To provide a wind tunnel balance wherein the response of a balance output can be secured, the balance is highly rigid, vibration output waveforms with multiple frequencies can be obtained, and highly accurate data can be obtained even with a wind tunnel test with short ventilation time.

A plurality 31, 32 of measuring parts 3 interposed between an outer cylinder 2 fitted over a sample to be integrated with the sample and a cylinder 1 fitted over a tip of a sting 04 for supporting the sample at a predetermined position in a wind tunnel and integrated with it for sensing deformation caused by load applied to the sample for detecting the aerodynamic load are provided separately from a center of a balance in an X-axis direction. This five-component force of the sample except a load Fx in the X-axis direction of the sample can be detected by tensile and compressive deformation caused on the front and rear measuring parts 31, 32, so that measurement accuracy of Fx with a small output can be improved, while balance rigidity can be increased thereby obtaining vibration outputs with multiple frequencies in a short time.