File photo of ex-Pyramids midfielder Nabil Emad (Ahram)
The Cairo club neither disclosed the transfer fee nor the length of the deal.
"It's a dream come true. Zamalek have always been my first choice," Emad said on his Instagram account upon completing the deal.
"I have no choice now but to defend the colours of Zamalek and make the greatest fans in Egypt happy. (It's) the start of something special."
Emad is Zamalek's second arrival in midfield following the signing of Moroccan Zakaria El Wardi last month. They also signed Senegalese forward Ibrahima Ndiaye from Swiss club Luzern.
The White Knights were keen to strengthen their midfield following the departure of linchpin Tarek Hamed, who joined Saudi club Ittihad after his contract expired at the end of last season. He has been one of the team's best performers over the past seven years, helping them to several titles.
Emad, an Egyptian international, is known for his passing abilities. He has been one of Pyramids' key players over the past few years.
Reports said Zamalek have also sealed deals for Emad's club teammate Omar Gaber, a right-back who is set to return to his boyhood club, and Benin striker Samson Akinyoola.
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