  In this paper, we discuss the Hyers-Ulam stability of mixed-type
additive-cubic Jensen functional equation \begin{align*}
2\mathcal{F}\left(\frac{2u+v}{2}\right)+2\mathcal{F}\left(\frac{2u-v}{2}\right)=\frac{1}{4}[\mathcal{F}(u+v)+\mathcal{F}(u-v)]+3\mathcal{F}(u)
\end{align*} in non-Archimedean $(n, \beta)$ normed spaces.
