Abdul Nacer Benbrika (Arabic: عبد الناصر بن بريكة) (born in Algeria c. 1960), also known as Abu Bakr (Arabic: أبو بكر), is a convicted criminal, currently serving an Australian custodial sentence of fifteen years, with a non-parole period of twelve years for intentionally being the leader and a member of a terrorist organisation. Benbrika was one of 17 men arrested in the Australian cities of Sydney and Melbourne in November 2005, charged with being members of a terrorist organisation and of planning terrorist attacks on targets within Australia. Benbrika is alleged to be the spiritual leader of the group. All 17 men pleaded not guilty. On 15 September 2008 Benbrika was found guilty as charged and subsequently sentenced.

Benbrika completed his sentence on 5 November 2020, but he is being kept in jail under an interim order from the Victorian Supreme Court requested by the Federal Government's Department of Home Affairs who applied to the court to keep him detained.