If you are from a European Country (EU) you donīt need a visa to enter in Brazil, just a valid passport and ur ticket back, and to prove that you have money to be here. You can stay for 90 days, if you need more you can have a prorrogation in Policia Federal, more 90 days. In resume you can stay in Brazil 180 days per year without visa.
There is the list of countries
Andorra
Argentina
Austria
Bahamas, The
Barbados
Belgium
Bolivia
Bulgaria
Chile
Colombia
Costa Rica
Croatia
Czech Republic
Denmark
Ecuador
Finland
France
Germany
Greece
Guatemala
Guyana
Honduras
Hong Kong
Hungary
Iceland
Ireland
Israel
Italy
Korea, South
Liechtenstein
Lithuania
Luxembourg
Macau
Malaysia
Monaco
Morocco
Namibia
Netherlands
New Zealand
Noruega
Panama
Paraguay
Peru
Philippines
Poland
Portugal
Romania
San Marino
Slovakia
Slovenia
South Africa
Sovereign Military Order of Malta
Spain
Suriname
Sweden
Switzerland
Thailand
Trinidad and Tobago
Tunisia
Turkey
United Kingdom
Uruguay
Vatican City
Venezuela