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In this paper, we have defined the weakly symmetric generalized Trans-Sasakian manifold $G{\left(WS\right)}_n$ and it has been shown that on such manifold if any two of the vector fields $\lambda ,\gamma ,\tau$, defined by equation (0.3) are orthogonal to $\xi$, then the third will also be orthogonal to $\xi$. We have also proved that the scalar curvature $r$ of weakly symmetric generalized Trans-Sasakian manifold $G{\left(WS\right)}_n$, $(n>2)$ satisfies the equation $r=2n\left({\alpha }^2-{\beta }^2\right)$, where $\alpha$ and $\beta$ are smooth function and $\gamma \ne \tau$.