The Preventative Coup of November 11, sometimes called the 1955 Brazilian coup d'état or referred to as an "anti-coup" or a "counter-coup", was a series of military and political events led by Henrique Teixeira Lott that resulted in Nereu Ramos assuming the presidency of Brazil until being peacefully succeeded by Juscelino Kubitschek a few months later. The bloodless coup removed Carlos Luz from the presidency because he was suspected of plotting to prevent Kubitschek from taking office. As a result of the tensions, Brazil had three presidents in the span of a single week.

Nereu de Oliveira Ramos was a Brazilian political figure. He briefly served as interim president of Brazil in the aftermath of the political crisis which culminated in the suicide of President Getúlio Vargas and the impeachment of Deputy Carlos Luz and President Café Filho.