The Greek economy shrank by a further 1.5% in the second quarter of the year.
A decline of 0.8% decline in GDP was recorded for the first three months of the year.
Greece's GDP has fallen 3.5% since this time last year.
The country has been forced to bring in severe public spending cuts since it sparked a Europe-wide debt crisis earlier this year.
The Elstat statistics agency said a "significant reduction" in public spending had contributed to the deepening of the country's recession.
Total decline in GDP during 2010 is forecast to hit 4%, according to the European Union and the International Monetary Fund.
A number of austerity measures have been announced by Greece since December last year.
They include a pay freeze for public sector workers and reform to the tax and pensions systems.