Heavy flavor physics with CMS

Different recent results from CMS Collaboration on Quarkonia Physics and Heavy Quarks production are presented. All these results have been obtained analyizing the data of $pp$ collisions at sqrt{s}=7 TeV provided by the LHC and collected by the CMS detector in the year 2010. The measurements of B-mesons, charmed mesons and open beauty production cross--sections are illustrated, together with the analysis techniques and the estimation of the systematics uncertainties, and compared with the predictions of the available theoretical models. A recent result from CDF on the Upsilon polarization is also reported.