New Physics with the ATLAS detector: experimental prospects.

During 2010 the ATLAS detector has collected sim 40~pb$^-1$ of {it proton-proton} collisions at sqrt{s}=7~TeV. These data have been used for a wide range of Exotic searches such as high-mass final states and contact interactions. Early inclusive SUSY searches have been also performed for a wide range of final states. The most recent results for search of physics beyond the Standard Model with the ATLAS detector are presented. Prospects for physics searches in view of higher luminosity scenarios will be discussed together with the most relevant experimental aspects and recent performance results.