  Recently it has been argued that a possible source for the dark energy may
arise due to the contribution to the vacuum energy of the QCD ghost in a
time-dependent background. In this paper we establish a connection between
interacting ghost dark energy and tachyon field. It is demonstrated that the
evolution of the ghost dark energy dominated universe can be described
completely by a single tachyon scalar field. The potential and the dynamics of
the tachyon field are reconstructed according to the evolutionary behavior of
ghost energy density.
