Masoud Ahmadi Moghaddasi (Persian: مسعود احمدی مقدسی‎; 1963 – 2 August 2005) was an Iranian judge and deputy to Saeed Mortazavi. He was assassinated on Tehran's Ahmad Ghasir Avenue while commuting home from work.^[1][2] The shooter was Majid Kavousifar, who was hanged two years later.

Moghaddasi was born in 1963 at the Balakhiaban neighbourhood of Mashhad to a poor family. His family was from Yazd.

He had ruled in the case of journalist Akbar Ganji which led to Ganji's imprisonment, and was also involved in the case of Zahra Kazemi. Moghadasi also was in charge of the trial of Iranian famous blogger Mojtaba Saminejad and his friends who were involved in that case.

Moghadasi was responsible for the trial sentencing and execution of thousands, including the 1988 executions of Iranian political prisoners.