Fourth generation quark searches with the ATLAS detector

We present searches for fourth generation quarks in data corresponding to an integrated luminosity of 1.04 fb-1 from pp collisions delivered by the LHC at $\sqrt{s}$=7 TeV recorded with the ATLAS detector. With three different analysis presented in this paper, ATLAS excludes at the 95\% confidence level a heavy down-type quark, heavy up-type quark and a more general heavy-quark with mass less than respectively 480 GeV, 404 GeV and 350 GeV.