  The zeroth-order general Randi\'{c} index $R^{0}_{a+1}$ of an $n$-vertices
oriented graph $D$ is equal to the sum of $(d^{+}_{u_i})^{a}+(d^{-}_{u_j})^{a}$
over all arcs $u_iu_j$ of $D$, where we denote by $d^{+}_{u_i}$ the out-degree
of the vertex $u_i$ and $d^{-}_{u_j}$ the in-degree of the vertex $u_j$, $a$ is
an arbitrary real number. In the paper, we determine the orientations of cacti
with the maximum value of the zeroth-order general Randi\'{c} index for $a\geq
1$.
