The ATLAS experiment at the Large Hadron Collider (LHC) measures charged hadron spectra obtained in 2010 and 2011 lead-lead LHC data taking periods with total integrated statistics of 0.15 nb −1 . The results are compared to the pp spectra of charged hadrons at the same centre-of-mass energy based on the data sample with integrated luminosity of 4.2 pb −1 obtained by the ATLAS experiment in 2011 and 2013. This allows a detailed comparison of the two collision systems in a wide transverse momentum (0.5 < pT < 150 GeV) and pseudorapidity (|η| < 2) ranges in different centrality intervals of Pb+Pb collision. The nuclear modification factor RAA is presented in detail as a function of centrality, pT and η. It shows a distinct pT-dependence with a pronounced minimum at about 7 GeV. Above 60 GeV, it is consistent with a flat, centrality-dependent, value within the uncertainties. The value is 0.55 ± 0.01(stat.) ± 0.04(syst.) in the most central collisions. The RAA is observed to be consistent with flat |η| dependence over the whole transverse momentum range in all centrality classes.