Ittihad Mostafa began his career with
Al Ahly youth team academy, Hassan can't reserve his place at Al Ahly's squad. In 2000 Hassan has joined Alexandria's giant
Al-Ittihad, Hassan Spend three seasons in Al Ittihad and has called up for
Egyptian national team, after that Hassan return to his home Al Ahly.
Al Ahly In 2003, Mostafa returned to Cairo's
Al Ahly. He also has many attempts on the goal, and scored 4 goals in the
Egyptian League (2005–2006) for
Al Ahly. He played a large role in Ahly winning the
CAF Champions League 2005 and
CAF Champions League 2006. He appeared for Egypt five times during their campaign in the
African Cup of Nations Egypt 2006, although all his appearances were as a substitute.
Loan to Al-Wahda In 2007, Mostafa signed a one-season loan to Saudi side
Al-Wahda. scoring a goal within this season. He returned to Al Ahly and cannot to play in the starting 11 of Al Ahly, and spent all 2008–2009 season on the bench. In 2009, Ahly released him.
Zamalek In summer 2009, Hassan joined Al Ahly's rivals
Zamalek for free and signed a three-season deal. ==Honours==