Argentina's economy grew 5.2% year on year in the first quarter of 2003, according to preliminary official figures.
Waiting for Kirchner: No statements so far on economic policy
It marks the beginnings of a possible recovery for the South American economy, which has been crippled by four years of recession.
The economy shrank nearly 11% last year, in what the government said was the country's worst economic performance in a century.
A record debt default and steep currency devaluation crushed consumer spending and caused foreign investors to flee.
Also on Friday, cabinet chief Alfredo Atanasof was reported as saying that tax collection would be 25% higher in May than in the same month last year.
The Argentine Government has argued that a rise in tax collection indicates economic recovery is on the way.
The government is forecasting 4.2% growth in the economy this year.
Some analysts are more bullish, expecting growth of as much as 10%.
The latest news on growth did little for the peso though, which slid 3.5% against the US dollar.
Analysts said investors remained nervous ahead of announcements on economic policy by president-elect Nestor Kirchner.
Mr Kirchner, a centre-left governor from Patagonia, is due to take office on 25 May.
Roberto Lavagna is expected to remain as economy minister and has said the president-elect is not considering any emergency or surprise economic measures.