Mario Benito Luna Sarmiento (born 19 October 1958) is an Argentine former footballer who played as a forward, and later worked as a manager. He began his career in his native Argentina, moving abroad to spend the 1980 North American Soccer League season with the Washington Diplomats. The rest of his career was spent with a variety of clubs in Spain and Argentina. After retiring, he worked as a coach, with his career including stints as manager at Al Khaleej in the United Arab Emirates and Deportivo Alavés in Spain. He has not held a managerial role since leaving Cerro Reyes in 2011.