  We present the cross-sections for the hadroproduction of squarks and gluinos
in next-to-leading order of supersymmetric QCD. The four possible final states
squark-antisquark, squark-squark, gluino-gluino and squark-gluino are analysed
for the hadron colliders Tevatron and LHC. The dependence of the cross-sections
on the renormalization and factorization scale is reduced significantly. The
shape of the transverse-momentum and rapidity distributions remains nearly
unchanged when the next-to-leading order SUSY-QCD contributions are included.
The size of the corrections at the central scale, given by the average mass of
the produced particles, varies between $+5\%$ and $+90\%$.
