Zhang Yue () (663–730),
courtesy name Daoji (道濟) or
Yuezhi (說之), formally
Duke Wenzhen of Yan (燕文貞公), was an official of the Chinese
Tang dynasty and
Wu Zetian's Zhou dynasty, serving as a
chancellor three separate stints during the reigns of
Emperor Ruizong and
Emperor Xuanzong. He is known for having suggested the transition of Tang central government armed forces from being conscription-based to recruitment-based, and for turning the office of the chancellor into a specialized post with strong executive powers.