Greeks are voting for the second time in a month with conservative ex-Prime Minister Kyriakos Mitsotakis hoping to secure a big majority.
He convincingly beat his centre-left rival in May but called new elections in a bid to govern Greece alone.
Today’s vote comes a little more than a week after a migrant boat tragedy off the Greek coast in which 500 people are thought to have died.
Mr Mitsotakis’s conservatives won last month’s elections by a 20-point margin over the centre-left Syriza party of Alexis Tsipras, another former prime minister, and he is confident of a repeat victory that would hand him a second term.
Without a majority of more than 150 in the 300-seat parliament, Mr Mitsotakis says his New Democracy party cannot form the stable government that is necessary.