The average yield was 3.40%, the central bank, which sells government securities on behalf of the finance ministry, said in a statement.
The bank received bids for 503.8 million euro worth of government debt paper in Friday's auction.
The ministry reopened a bond issue that was first launched in May 2011. The bonds carry a coupon of 4.50% and mature on May 6, 2014.
Romania last sold euro-denominated bonds on the domestic market on October 22, when it placed 421.5 million euro in four-year T-notes at an average yield of 3.75%.
The finance ministry has sold 49 billion lei ($13.8 million/10.8 billion euro) and 763.3 million euro in government securities on the domestic market so far this year.
Romania has also sold $2.25 billion in dollar-denominated bonds on the U.S. market and 2.25 billion euro in euro-denominated bonds on international markets since the beginning of 2012.
($ = 0.7846 euro).