SUSY Searches with ATLAS at LHC

SUSY is one the main topic of the research program at the ATLAS experiment at LHC. The discovery reach in early data is presented for different search channels based on missing transverse momentum from undetected neutralinos and multiple jets. The methods of data-driven background estimation are presented. Finally the talk presents also the studies on the SUSY model parameters that will be done based on the selection of final-state with exclusive decay chains.