  The property and gravitational field of global monopole of tachyon are
investigated in a four dimensional static space-time. We give an exact solution
of the tachyon field in the flat space-time background. Using the linearized
approximation of gravity, we get the approximate solution of the metric. We
also solve analytically the coupled Einstein and tachyon field equations which
is beyond the linearized approximation to determine the gravitational
properties of the monopole solution. We find that the metric of tachyon
monopole represents an asymptotically AdS space-time with a small effective
mass at the origin. We show that this relatively tiny mass is actually
negative, as it is in the case of ordinary scalar field.
