Ahmat Acyl (1944–1982) was a Chadian Arab insurgent leader during the Chadian Civil War.

Under the Tombalbaye Regime, Acyl had been a National Assembly deputy from Batha. In 1976 he passed to the insurgency, entering in Libya in the small Arab-dominated Volcan Army. With the support of Muammar Gaddafi, Libya's President, he opposed the group's leader Mohamed Baghlani, and when the latter died in a traffic accident in Tripoli in 1977, Acyl was promptly designed new leader of the militia. From that moment, he was known as Gaddafi's man in Chad.

Acyl rapidly strengthened his militia, which became famous for the quality of its fighters and imposed itself on the Chadian checker, garnering increasing support among the Arab element in the country. Important was also Libya's support to Acyl's group, that from 1978 became bigger and steadier than that to the other insurgent factions. In the same year Acyl had supported Libya's gol to reunite the FROLINAT's main factions, that resulted in the congress of Faya in which Goukouni Oueddei, leader of the People's Armed Forces (FAP), was made new secretary-general of the FROLINAT. The accord didn't last long: Gaddafi instigated Acyl to attack Goukouni Oueddei's People's Armed Forces (FAP) positions in Faya on August 27, 1978, in an attempt to wrestle from Goukouni the control of the FROLINAT, but was defeated. Acyl, that was at the time the FROLINAT's adjutant chief of staff in charge of the direction and administration of the military, promptly left Faya for Tripoli under the protection of Libyan troops.