The economy of the 17 countries that use the euro grew by 0.8% in the first three months of 2011, up from 0.3% in the previous quarter.Germany was largely responsible for the better-than-expected figure, reporting growth of 1.5% in the period.
There was a surprisingly strong 0.8% growth rate from debt-laden Greece.
France grew 1%, Italy and Spain grew 0.1% and 0.3% respectively and Portugal slid into recession after contracting for the second quarter in a row.
Growth there declined by 0.7%, following a 0.6% contraction in the final quarter of 2010.
"This is almost certainly as good as it gets for the eurozone and growth seems likely to moderate over the coming months in face of significant headwinds," said Howard Archer at IHS Global Insight.
'Huge positive surprise'