The influence of static magnetic fields on mass transfer rates in the electroreduction of ferrocyanide ions around an inclined cylindrical cathode was studied experimentally with a supporting electrolyte. The mass transfer rate was found to be increased by applying the magnetic field. The obtained mass transfer coefficient was correlated well by a non-dimensional regression equation by using a new dimensionaless term, "magneto-diffusion factor", instead of the Hartmann number to express the contribution of the applied magnetic flux density.