Mena state news agency says ElBaradei met interim President Adly Mahmud Mansour, three days after the army removed Islamist leader Mohammed Morsi amid growing nationwide unrest.
The move has in turn triggered mass unrest by supporters of Morsi.
71-year-old ElBaradei is a former head of the UN nuclear watchdog.
He and other party leaders attended a meeting called by Mansour today.
ElBaradei leads an alliance of liberal and left-wing parties, the National Salvation Front.
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In an interview on Thursday, ElBaradei defended the army's intervention, saying: "We were between a rock and a hard place."
"It is a painful measure, nobody wanted that," he said. "But Mr Morsi unfortunately undermined his own legitimacy by declaring himself a few months ago as a pharaoh and then we got into a fist fight, and not a democratic process."
More than 30 people died and hundreds were wounded in yesterday's protests by Islamist supporters of the deposed president.
Meanwhile opponents of Morsi have called for demonstrations against the Muslim Brotherhood, to which he belongs, tomorrow.
Morsi is in detention, along with some senior Brotherhood figures.