A Schengen Visa (issued by a consulate or embassy of a Schengen State) is valid for all
of the Schengen Area (including the European territory of Czech Republic), unless it is
otherwise on the visa sticker. So you do not need another visa to enter or stay in the
territory of Czech Republic. However, you must be in possession of documentary evidence
the reasons of your stay and your means of support. Schengen Area comprises of the
countries: Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France,
Greece, Hungary, Iceland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta,
Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, and Switzerland.