The acoustic radiation force was measured for a dual‐temperature resonant chamber. This rectangular chamber has its long dimension approximately 8.5 times the square cross‐sectional dimension, and the opposite ends are at widely different temperatures. Force profiles were obtained for two hot end temperatures of 520 °C and 760 °C, while the cool end remained at approximately room temperature. The lateral force was measured as a function of the long dimension of the chamber along the temperature gradient, and as a function of the drive voltage. Force magnitudes as high as 17 dyn for a sample 1.2 cm in diameter at 760 °C and at 162‐dB input level were measured. Qualitatively, the measured force profiles correspond well with the theoretical curves; the correlation of absolute magnitude, however, is yet to be determined.