  The existing estimation of the Electric Dipole Moment(EDM) of the neutron in
the SUSY SU(5) GUT model was quite smaller than one in the MSSM, despite of its
increased degree of freedom. This paradoxical result can be resolved by
appropriately estimating the CP-violation in the Higgs sector. As a result, the
neutron EDM in this model is estimated lager than the existing one as expected.
