César Luis Menotti (Spanish pronunciation: [ˈsesaɾ ˈlwis meˈnoti]; born 5 November 1938), known as El Flaco ("Slim"), is an Argentine former football manager and player who won the 1978 FIFA World Cup as the head coach of the Argentina national team.

During his playing days, he played as a striker, most notably for Argentine clubs Rosario Central and Boca Juniors.

Menotti was appointed the head coach of the Argentina national team in October 1974 and also in Barcelona, helping them to win the Copa del Rey 1983, Copa de la Liga and the 1983 Supercopa de España before leaving in 1984.