  We study inflation in a supersymmetric Pati-Salam model driven by a potential
generated in the context of no-scale supergravity. The Pati-Salam gauge group
$SU(4)_{c}\times{SU(2)_{L}\times{SU(2)_{R}}}$ , is supplemented with a $Z_{2} $
symmetry. Spontaneous breaking via the $SU(4)$ adjoint leads to the left-right
symmetric group. Then the $SU(2)_{R}$ breaks at an intermediate scale and the
inflaton is a combination of the neutral components of the $SU(2)_{R}$
doublets. We discuss various limits of the parameter space and we show that
consistent solutions with the cosmological data for the a spectral index
$n_{s}$ and the tensor-to-scalar ratio r are found for a wide range of the
parameter space of the model. Regarding the latter, which is a canonical
measure of primordial gravity waves, we find that $r\sim{10^{-3}-10^{-2}}$. An
alternative possibility where the adjoint scalar field $S$ has the role of the
inflaton is also discussed.
