Ahmed Mansour, who works for the channel's Arabic-language service, was taken into custody while boarding a flight from Berlin to Qatar, the BBC reported.
A German police official said that an international arrest warrant had been issued against Mansour by Egyptian authorities as a Cairo court sentenced him to 15-year jail term last year over torture charges.
Al Jazeera said that the allegations levelled against Mansour, who holds dual British and Egyptian citizenship, were both absurd and utterly false.
A tweet posted by Mansour on Saturday night said that he was still under arrest at Berlin airport, waiting to be taken before an investigating judge. He added that he is expected to remain in custody till Monday.
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