The All Pakistan Muttahida Students Organization (APMSO; Urdu: ( )) is a Pakistani student organization notable for creating a political party: the Mohajir Quami Movement, now called the Muttahida Qaumi Movement (MQM).

APMSO was founded by Altaf Hussain along with other students including Azeem Ahmed Tariq, Dr. Imran Farooq on Sunday, 11 June 1978 at Karachi University. Hussain also served as a 1st Chairman of organization while Azeem Ahmed Tariq served as 1st General Secretary of the organization.

Altaf Hussain (Urdu: الطاف حسین; pronounced [əltaːf ɦʊseːn]; born 17 September 1953 in Karachi) is a British Pakistani politician who is known as the founder of the Muttahida Qaumi Movement. He holds United Kingdom citizenship and has been living in exile in Great Britain since the start of Operation Clean-up. Since 2015, he has been a fugitive from the Anti Terrorism Court of Pakistan on the charges of murder, targeted killings, treason, inciting violence and hate speeches he is due to go on trial in the United Kingdom in January 2022 for promoting terrorism and unrest through hate speech in Pakistan. He fled the country in 1992 after crackdown against his party was launched and since then he is living in the United Kingdom.