As the final chapter of part II, magnetohydrodynamical (MHD) equations are generalized to tensor forms so that they can be applied to general relativistic systems. After deriving basic general relativistic MHD equations (GRMHD equations), we rewrite these equations in forms which are analogous to forms of non-relativistic MHD equations, so that they can be easily compared with non-relativistic ones. The readers are supposed to have fundamental knowledge of tensor analyses.