SUSY HIGGS PRODUCTION AT PROTON COLLIDERS

We present the QCD corrections to the gluon fusion processes of the sc alar Higgs particles h, H and the pseudoscalar Higgs particle A in the minimal supersymmetric extension of the Standard Model. These correct ions are in general large and positive, increasing the production cros s section up to factors of about 2. While they depend only weakly on t he Higgs masses, they are strongly dependent on the parameter tg beta.