The interaction of an elastic wave with the two‐dimensional bound spin waves of a Bloch wall is investigated. Our formulation shows that the 180° Bloch wall couples only with the shear waves while the 90° wall couples with both longitudinal and shear waves. We have computed the spin‐wave amplitude, the power absorbed, the change in the modulus, and theQof the interaction for both these cases. The major effect comes from the coupling of the 90° wall with the longitudinal waves which yields, for iron, a 0.1% to 1.0% change in the elastic constant and a logarithmic decrement of approximately 0.02 for a density of Bloch walls equal to 330/cm.