Abdelbaset Ali Mohmed Al Megrahi (Arabic: عبد الباسط محمد علي المقرحي‎) (born April 1, 1952) is a former Libyan intelligence officer, head of security for Libyan Arab Airlines, and director of the Center for Strategic Studies in Tripoli. On January 31, 2001, he was convicted, by a panel of Scottish Judges sitting in a special court at Camp Zeist in the Netherlands, of 270 counts of murder for his part in the bombing of Pan Am Flight 103 over Lockerbie, Scotland, on December 21, 1988. Megrahi was sentenced to life imprisonment and is serving his sentence in Greenock prison, near Glasgow. He has always maintained his innocence and, following the rejection of his first appeal in 2002, was granted leave in 2007 for a second appeal against conviction.

His co-accused, Al Amin Khalifa Fhimah was found not guilty and was acquitted.

In November 1991, Megrahi and Fhimah were indicted by the US Attorney General and the Scottish Lord Advocate for the bombing of Pan Am Flight 103. Libya refused to extradite the two accused, but held them under house arrest in Tripoli.