This study reports a new multiphase device, the mixer equipped with the rotating magnetic field (RMF) generator, which shows high rates of gas-liquid mass transfer in comparison to a convectional mixer with impeller. The volumetric gas-liquid mass transfer coefficient k(L)a in the tested apparatus with application of the RMF increases with increasing magnetic field and superficial gas velocity. It is shown that the mass transfer process under the RMF action has significantly higher values of the k(L)a coefficient than the conventional Rushton turbine or the synergistic effect of the rotational Rushton turbine and the RMF generator. The empirical relationships between this coefficient and the operational parameters obtained in this work can provide helpful guidance for design and operation of set-up equipped with the RMF or the mechanical mixer supported by RMF.