  We study the influence of phantom fields on strong field gravitational
lensing. Supposing that the gravitational field of the supermassive central
object of the Galaxy is described by a phantom black hole metric, we estimate
the numerical values of the coefficients and observations and find that the
influence of the phantom fields is somewhat similar to that of the electric
charge in a Reissner-Norstr\"{o}m black hole, i.e., the deflect angle and
angular separation increase with the phantom constant $b$. However, other
observations are contrary to the Reissner-Norstr\"{o}m case and show the
effects of dark energy, such as (i) compressing the usual black hole and more
powerfully attracting photons, (ii) making the relativistic Einstein ring
larger than that of the usual black hole, and (iii) not weakening the usual
relative magnitudes, which will facilitate observations.
