The ATLAS discovery reach for Supersymmetry with first data

The search for physics beyond the Standard Model (BSM) is one of the most important goals for the general purpose detector ATLAS at the Large Hadron Collider at CERN. Already with early LHC data, the ATLAS experiment should be sensitive to discover physics beyond the Standard Model. In this talk I summarize the prospects of the ATLAS experiment to find experimental evidence for Supersymmetry (SUSY) in channels with jets, leptons and missing transverse energy for an integrated luminosity of L = 200pb-1 at a centre-of-mass energy of 10 TeV.