Aga Syed Mustafa Al-Moosavi Al-Safvi (2 February 1924 – 21 August 2002) was a Kashmiri Shia Muslim cleric, Islamic Jurist, Islamic scholar and philanthropist and former President of Anjuman-e-Sharie Shian Jammu and Kashmir and Former chairman of Madras E Babul Ilm.
He was born on 2 February 1924 to Ayatullah Aga Syed Ahmad. Aga Syed Mustafa began studying the Quran and theology from a young age and was assisted in his religious studies by his grandfather Ayatullah Aga Syed Muhammad, his father Ayatullah Aga Syed Ahmad, his uncle Ayatullah Aga Syed Yousuf, and Haji Amin Sahab. At the age of 22 years he lost his father Ayatullah Aga Syed Ahmed Al-Moosavi, people chose Aga Syed Mustafa as Ayatullah Aga Syed Ahmad's successor(citation needed) but Mustafa refused to accept the role, wanting his uncle Ayatullah Aga Syed Yousuf as the successor of his father. He entrusted the family affairs to his uncle who took over the traditional responsibilities performed by the Aga family. Ayatullah Aga Syed Mustafa went to Hawza 'Ilmiyah Najaf, Iraq for higher studies to fulfill his late father's wish.
After returning to Kashmir Ayatullah Aga Syed Mustafa worked as the deputy of his uncle and helped him in the religious affairs. In Kashmir he headed the Sharia Court founded by Ayatullah Aga Syed Mehdi Sarkaar over 100 years previously. Aga Syed Yousuf and Aga Syed Mustafa introduced and promoted the concept of Wilayat Al-Faqih in Kashmir. In 1980 Ayatullah Khamenei was invited to Kashmir by Ayatullah Aga Syed Yousuf, Ayatullah Khamenei addressed the people of Kashmir from the pulpit of historic Jamia Masjid Srinagar
Aga Syed Mustafa died on 21 August 2002 due to prolonged illness, according to official reports thousands of people attended the funeral prayer at Budgam. Late Aga Syed Mustafa is buried at ancestral Shrine in Budgam Kashmir