The case against Canadian national Mohammed Fahmy, Australian journalist Peter Greste and Egyptian producer Baher Mohammed embroiled their journalism into the wider conflict between Egypt and Qatar following the 2013 military ouster of Islamist President Mohammed Morsi.
It wasn't immediately clear how the sentence would affect the three men. Greste, deported in February, spoke to Al-Jazeera from Sydney and criticised the verdict. Mostefa Souag, Al-Jazeera English acting director-general, also criticised the verdict, saying it "'defies logic and common sense."
"There is no evidence proving that our colleagues in any way fabricated news or aided and abetted terrorist organisations and at no point during the long drawn out retrial did any of the unfounded allegations stand up to scrutiny."
The case began in December 2013, when Egyptian security forces raided the upscale hotel suite used by Al-Jazeera at the time to report from Egypt.
Also Read
Authorities arrested Fahmy, Greste and Mohammed, later charging them with allegedly being part of Morsi's Muslim Brotherhood, which authorities have declared a terrorist organisation, and airing falsified footage intended to damage national security.
Al-Jazeera and the journalists have denied the allegations, saying they were simply reporting the news. However, Doha has been a strong supporter of the Brotherhood and other Islamist groups in the greater Mideast.
At trial, prosecutors used news clips about an animal hospital with donkeys and horses, and another about Christian life in Egypt, as evidence they broke the law. Defence lawyers -- and even the judge -- dismissed the videos as irrelevant.
Nonetheless, the three men were convicted on June 23, 2014, with Greste and Fahmy sentenced to seven years in prison and Mohammed to 10 years.