The LHCb experiment and its expected physics performance

The LHCb experiment is dedicated to the study of heavy flavour physics at the LHC machine. Its primary motivation is to study with high statistics and precision CP violation and rare B hadron decays, to improve the knowledge of the Standard Model or to get indirect hints of new physics contribution to the flavour physics. The main experimental features of the experiment are presented and the sensitivities on some important measurement that LHCb will perform since the first data will be available are discussed.