  We calculate the production cross section of the ``CP-odd'' Higgs boson via
gluon fusion in the minimal supersymmetric standard model with explicit CP
violation in the stop sector. We show that there is a parameter region in which
the cross section is enhanced by a factor of about 1000, as compared to the
case without CP violation in the stop sector. In the parameter region where the
``CP-odd'' Higgs boson can decay into a stop pair, the stop pair events will be
the important signature of the enhanced ``CP-odd'' Higgs boson. In the case
where the ``CP-odd'' Higgs boson cannot decay into any superparticles, the
gamma gamma and tau tau decay channels could become important for discovering
the ``CP-odd'' Higgs boson. We also discuss the constraints from electric
dipole moments of electron, neutron and mercury on the viable parameter space
mentioned above.
