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We study inflation in a supersymmetric Pati-Salam model driven by a potentialgenerated 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-rightsymmetric group. Then the $SU(2)_{R}$ breaks at an intermediate scale and theinflaton is a combination of the neutral components of the $SU(2)_{R}$doublets. We discuss various limits of the parameter space and we show thatconsistent 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 theparameter space of the model. Regarding the latter, which is a canonicalmeasure of primordial gravity waves, we find that $r\sim{10^{-3}-10^{-2}}$. Analternative possibility where the adjoint scalar field $S$ has the role of theinflaton is also discussed.

Inflation from a No-scale supersymmetric $SU(4)_{c}\times{SU(2)_{L}\times{SU(2)_{R}}}$ model