A Schengen Visa (issued by a consulate or embassy of a Schengen State) is valid for all 26 States
of the Schengen Area (including the European territory of Portugal), unless it is marked
otherwise on the visa sticker. So you do not need another visa to enter or stay in the European
territory of Portugal. However, you must be in possession of documentary evidence for the
reasons of your stay and your means of support. Schengen Area comprises of the following
countries: Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany,
Greece, Hungary, Iceland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands,
Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, and Switzerland.