Greek Prime Minister Alexis Tsipras has defended controversial new pension and tax reforms approved by parliament.
The measures are needed to unlock further international bailout money, to be discussed at a meeting of Eurozone finance ministers on Monday.
But they are deeply unpopular with Greek anti-austerity campaigners and trade unions.
Mr Tsipras said the changes would not affect the majority of pensioners and moved towards a “sustainable” system.
He said that new higher contributions would safeguard the country’s state pension provision.
Before the vote, protesters in Athens threw petrol bombs at police, who responded with tear gas.