Artāsh (Irtash) ibn Tutush was nominal Saljūq ruler of Damascus in October-December 1104, with the honorific title Muhyi al Din (Reviver of Religion).
A son of Tutush I, king of Syria, Artāsh was imprisoned at Baalbek during the reign of his nephew, Tutush’s son Duqāq, in Damascus. At the age of twelve he was freed at the instigation of Zāhiral-Din Tughtigin, Duqāq’s atabeg of Damascus, who had just removed Duqāq’s infant son Tutush II (1104). Artāsh was appointed ruler under Tughtigin’s tutelage on 10 October 1104, but evidently feared for his life and in December fled to take refuge with Aytakin al-Halabi, the governor of Bosra. He attempted to persuade King Baldwin I of Jerusalem to attack Damascus in his support, but the king was fully preoccupied with an Egyptian invasion in August 1105. In September Tughtigin’s troops took Bosra, and Artāsh and Aytakin fled to Iraq. Artāsh was the last member of the Saljûqdynasty to occupy the throne of Damascus.