The organization cited jailed Burmese journalist U Win Tin for refusing repeated government demands to renounce his commitment to the National League for Democracy.
U WIn Tin has served 17 years of a 20 year sentence in a prison near Rangoon.
The Media prize went to the Russian newspaper Novaya Gazeta - for which noted journalist Anna Politkovskaya worked at the time of her murder in October.
The Defender of Press Freedom award went to the Congolese-based organization "Journalist in Danger" - one of Africa's most respected press freedom organizations.
Cuban dissident Guillermo Farinas Hernandez, head of the independent news agency Cubanacan Press, received the Cyber-Dissident award.
Reporters Without Borders notes that several past winners have been released from prison within months of receiving their awards.
Among them are 2002 winner, Russian journalist Grigory Pasko; 2003 winner, Moroccan journalist Ali Lmrabet; and Burmese journalist San San Nweh, who was freed in 2001.
This Information is provided by RWB