  We define the new description of the electromagnetic current to hold the
current conservation in the momentum-dependent Dirac fields from the Ward
Takahashi identity. To describe the momentum-dependence we solve the
relativistic Hartree-Fock approximation by using the one-pion exchange. In
addition we discuss on contribution from the one-pion exchange current and the
core polarization. It is shown that this current can reduce the convection
current in the isovector case, whose value has been too big due to the small
effective mass in the usual relativistic Hartree approximation.
