Abu Ubaida al-Masri (Arabic: ابو عبيده المصري‎) (died December 2007) was an al-Qaeda operative in Pakistan. Al-Masri has been implicated in the 2006 Transatlantic Aircraft Plot, which was to be carried out by a terrorist cell operating in London, but which was orchestrated by al-Qaeda's central leadership.

Al-Masri is Egyptian (the epithet literally means 'the Egyptian') but he received combat experience, and terrorist and insurgent training in Afghanistan, Bosnia and Chechnya.

Until recently al-Masri was thought to be a provincial al-Qaeda commander in Afghanistan, but according to The New York Times, " emerged as one of Al Qaeda's senior operatives after the death of Abu Hamza Rabia, another Egyptian who was killed by a missile strike in Pakistan in 2005."