  In this paper, we study the generalized Hyers-Ulam stability of
Euler-Lagrange type cubic functional equation of the form \begin{align*} 2mf(x
+ my) + 2f(mx - y) = (m^3 + m)[f(x+ y) + f(x - y)] + 2(m^4 - 1)f(y)
\end{align*} for all $x,y \in X$, where $m$ is a fixed scalar such that $m \neq
0,1$, and $f$ is a map from a quasi-normed space $X$ to a quasi-Banach space
$Y$ over the same field with $X$ by applying the alternative fixed point
theorem.
