The unified charged‐particle interaction operators of Kihara and Aono have been used in the system of kinetic equations for a partially ionized, nonisothermal gas in a magnetic field. It has been assumed that the coupling between the kinetic equation of the electrons and those of the heavy species is weak, as it is always the case in MHD‐generator plasmas. It has been demonstrated that the new theory introduces essential corrections to the values of transport coefficients calculated by other theories of nonisothermal plasmas. Simplified calculation methods for electron transport coefficients have been proposed, which are based on the exact results given by this theory.