Bachir Pierre Gemayel (Arabic: بشير بيار الجميّل Arabic pronunciation: [baˈʃiːr ʤɪ'ma.jjɪl]; 10 November 1947 – 14 September 1982) was a Lebanese militia commander who led the Lebanese Forces, the military wing of the Kataeb Party in the Lebanese Civil War and was elected President of Lebanon in 1982.

He founded and later became the supreme commander of the Lebanese Forces, uniting major Christian militias by force under the slogan of "Uniting the Christian Rifle". Gemayel allied with Israel and his forces fought the Palestine Liberation Organization and the Syrian Army. He was elected president on 23 August 1982, but he was assassinated before taking office on 14 September, via a bomb explosion by Habib Shartouni, a member of the Syrian Social Nationalist Party.Gemayel is described as the most controversial figure in the history of Lebanon. He remains popular among Maronite Christians, where he is seen as a "martyr" and an "icon". Conversely, he has been criticized for committing war crimes and accused of treason for his relations with Israel.