  We calculate the one-loop supersymmetric QCD corrections to the width of the
$W$-boson. We find that these are of order $\sim {{ \alpha_s} \over {\pi}} {1
\over 20} { {M^2_W} \over {M_S^2}} \Gamma_{u {\bar d}}$, where $M_S$ is the
supersymmetry breaking scale and $ \Gamma_{u {\bar d}}$ the tree level hadronic
width for $W^+ \rightarrow u {\bar d} $. Due to the appearance of the
suppression factor $\sim {1 \over 20}$ these are at least two orders of
magnitude smaller than the standard QCD corrections $\sim {{ \alpha_s} \over
{\pi}} \Gamma_{u {\bar d}}$ and hence of the order of the two-loop electroweak
effects. Therefore supersymmetric QCD corrections will only be of relevance
once experiments reach that level of accuracy.
