Atef Muhammad Naguib Sedky (29 August 1930 – 25 February 2005) (Arabic: عاطف محمد نجيب صدقى‎, IPA: [ˈʕɑːtˤef mæˈħæmmæd næˈɡiːb ˈsedʔi]) was the Prime Minister of Egypt from 1986 until 1996. He replaced Ali Mahmoud Lutfi on November 10, 1986.

Sedky was born in the Nile Delta city of Tanta. He was a lawyer and economist by training, receiving a doctorate in economics from the University of Paris in France. Before becoming Prime Minister, he was the director of the Egyptian Central Auditing Agency. In 2004, Sedky fractured his thigh. He died on 25 February 2005 at a Cairo hospital. Sedky was survived by his German-born wife, Ursula, and their two children.

As Pime Minister, he supervised and sometimes criticised reforms suggested by the International Monetary Fund. In November 1993, he survived an assassination attempt in Cairo by the militant Islamic group Vanguards of Conquest, which resulted in the death of a schoolgirl called Shaimaa. On 2 January 1996, he along with his cabinet resigned; his post was filled two days later by Kamal Ganzouri. Sedky is the longest serving Egyptian prime minister since the Khedivate in 1878.