A Schengen Visa is the document issued for visiting/travelling in and within the Schengen Area. The Schengen Area is comprised of 26 countries that have agreed to allow free movement of their citizens within this area as a single country. If you intend to visit one of the Schengen countries for business, as a tourist or for a personal/private visit, you must first obtain a Schengen visa, unless your country is part of the Shengen territory or has a special agreement.
For More Information http://www.schengenvisainfo.com/who-needs-schengen-visa/
Requirements for a Schengen visa may vary slightly between the different Schengen countries. Please visit the following link for further information: http://www.schengenvisainfo.com/
Your application should be lodged at the Embassy or Consulate at least 4 weeks before the proposed journey is undertaken.
Note: Please notice that although every effort has been made to ensure the accuracy of the above information, it is your responsibility to check that the visa and travel requirements with the corresponding Embassy in your country.