The Anti-Rightist Campaign (simplified Chinese: 反右运动; traditional Chinese: 反右運動; pinyin: Fǎnyòu Yùndòng) in the People's Republic of China, which lasted from 1957 to roughly 1959, was a political campaign to purge alleged "Rightists" within the Chinese Communist Party (CCP) and the country as a whole. The campaign was launched by Chairman Mao Zedong, but Deng Xiaoping and Peng Zhen also played an important role. The Anti-Rightist Campaign significantly damaged democracy in China and turned the country into a de facto one-party state.

The definition of rightists was not always consistent, often including critics to the left of the government, but officially referred to those intellectuals who appeared to favor capitalism, or were against one-party rule as well as forcible, state-run collectivization. According to China's official statistics published during the "Boluan Fanzheng" period, the campaign resulted in the political persecution of at least 550,000 people. Some researchers believe that the actual number of persecuted is between 1 and 2 million or even higher. Deng Xiaoping admitted that there were mistakes during the Anti-Rightist Campaign, and most victims have received rehabilitation since 1959.