  Let $R$ be a commutative ring with non-zero identity. The cozero-divisor
graph of $R$, denoted by $\Gamma^{\prime}(R)$, is a graph with vertices in
$W^*(R)$, which is the set of all non-zero and non-unit elements of $R$, and
two distinct vertices $a$ and $b$ in $W^*(R)$ are adjacent if and only if
$a\not\in Rb$ and $b\not\in Ra$. In this paper, we show that the cozero-divisor
graph of a von Neumann regular ring with finite clique number is not only
weakly perfect but also perfect. Also, an explicit formula for the clique
number is given.
