Status and expected performance of the LHCb experiment

LHCb is a dedicated b-physics experiment at the future LHC collider. Its construction has started and it will be ready to take data from the start of LHC operation, scheduled in 2007, and directly at its full physics potential. LHCb will benefit from an unprecedented source of b-hadrons, provided by LHC, to improve substantially precision measurements of CP violation parameters in many different and complementary channels. The detector provides good particle identification, vertexing and has an efficient and flexible trigger. Its status and expected performance are reviewed.