Diab al-Mashi (b. 1915 - d. 11 August 2009) (Arabic: دياب الماشي‎) was a member of the parliament of Syria, for the district of Manbij, Aleppo. He won his first term in the 1954 parliamentary elections, and has served continuously until his death. With 55 years of service, he is considered one of the longest-serving members of parliament ever.