A judge in hearing Mubarak's case yesterday postponed the retrial to August 25.
Mubarak, 85, faces charges connected to the killing of over 800 protesters during the 18-day uprising against his rule.
His trial, which was adjourned last month, continued despite the latest upheaval in the country he ruled for 30 years. Protesters calling for a reinstatement of his successor as president Mohammed Morsi, have battled with security forces for days, leaving hundreds dead.
After appealing their convictions, they were granted a new trial early this year.
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Six of Mubarak's former security aides last year were acquitted of charges related to the killings, and Mubarak's two sons -- Gamal and Alaa -- were acquitted of corruption charges.
But they, too, were ordered to be retried after Morsi, himself ousted by the army last month, ordered a new investigation last year.
Mubarak and the other defendants have pleaded not guilty to all charges. The former president made his first court appearance in May.
Mubarak's health has been a bone of contention during his trial and incarceration. He suffered a heart attack after relinquishing power and had maintained that he was physically unfit to stand trial.
He is also charged with seizing public funds and misusing political influence. In addition, he faces a corruption charge that was not part of the original trial.