Top quark mass measurement with ATLAS

The top quark mass measurement with ATLAS in the lepton plus jets channel is summarized in the perspective of the first data taking. Using the invariant mass of the three jets arising from the hadronic side as the estimator of the top quark mass, a precision of the order of 1 to 3.5 GeV on the top quark mass measurement should be achievable with with 1 fb^{-1} of collected data, assuming a jet energy scale uncertainty of 1 to 5%.