Search for the Light Charged Higgs in CMS

In this report the CMS potential for the light charged Higgs boson discovery in the Minimal Supersymmetric Standard Model is presented. First the latest results of the Tevatron and LEP experiments on the light charged Higgs search are reminded. In the rest of the report the recent results of CMS fot the light charged Higgs search are presented. The results are based on the full simulation and reconstruction of the CMS detector including the systematic uncertainties on the background determination. Finally the 5 sigma contour for an integrated luminosity of 30 fb-1 is shown.