  I present a detailed SUSY QCD calculation of the decay rate of the lightest
Higgs boson $H^0_2$\ into two gluons, where all quarks and scalar quarks are
taken within the relevant loop diagrams. I include the mixing of all the scalar
partners of the left and right handed quarks and show that their contribution
is more than several tens of per cent compared to the quark contribution in the
MSSM for some SUSY parameter space. Furthermore the fermionic contribution is
enhanced by several factors for large $\tan\beta$\ and large Higgs masses. As a
result, the two gluon decay rate of $H_2^0$\ is much larger than the two gluon
decay rate of an equal mass standard model Higgs boson. I further compare the
decay mode of $H^0_2\rightarrow gg$\ to the similar decay modes of
$H^0_2\rightarrow c\overline c$\ and $H^0_2\rightarrow b\overline b$\ including
one loop QCD corrections and show that in some cases $\Gamma(H^0_2\rightarrow
gg)$\ is even higher than $\Gamma(H^0_2\rightarrow c\overline c)$, although
still much smaller than $\Gamma(H^0_2\rightarrow b\overline b)$.
