Alejandro Agustín Lanusse Gelly (August 28 1918 - August 26 1996) was the military president of Argentina between 22 March 1971 and 25 May 1973.

In 1951 he was was senetenced to life imprisonment for his part in an attempted coup to overthrow Juan Perón. He was released in 1955 and became Commander-in-chief of the army in 1968. He became President in 1971 after seizing power in a coup. He called free elections in 1973 and was beaten by the Peronist Cámpora.

He criticised the human rights violations of the Dirty War and testified against military leaders in their trials in 1985. He remained a staunch anti-Peronist and was put under house arrest in 1994 for criticising Carlos Menem in a magazine interview.