Abd al-Sattar al-Aboussi (Arabic: عبد الستار العبوسي, 1930 – 26 November 1970) was an Iraqi military officer.
He's recognized as the main perpetrator of the al-Rehab Palace Massacre and the killer of the Iraqi Hashemite royal family during the 14 July 1958 revolution.
Al-Aboussi had two brothers, the first, Jawad, worked as a military officer and was killed on national duty, while the second, Rashid, was a student studying biology in the United States.
At the garden of the palace, al-Aboussi, alongside an Iraqi soldier named Mustafa Abdullah, opened fire on the royal family without warning.
In a recorded meeting with an Iraqi officer named Adnan Muhammad Nuri, al-Aboussi stated that the event made him lack sleep and have dreams where Faisal II, in white clothes, confronted him and asking repeatedly him "Why did you kill me?