Prospects for B physics at CMS

The Compact Muon Solenoid (CMS) is a multi-purpose detector which will be operated at the Large Hadron Collider (LHC) at CERN. The capabilities of the CMS experiment in the field of B physics has been studied in several benchmark processes which are representative of exclusive B physics analysis. They allow to study the capability of CMS to identify, select and reconstruct the decay of the b-flavoured hadrons, which presents a significant challenge due to their relatively low momentum and high background. These studies will be presented after a brief description of the detector, the trigger system and the trigger strategy envisaged for B physics.