The physics potential of the LHC

This talk is a short overview of the physics potential of the LHC with emphasis on Higgs search and SUSY search. First I review why LHC with the ATLAS and CMS detectors is expected to give a decisive test of the electroweak symmetry breaking mechanism of the Standard Model. Then I consider the Higgs sector of the Standard Model (SM). Finally the search for supersymmetry is discussed within the framework of various implementation of the Minimal Supersymmetric Standard Model (MSSM).