Cao Rulin (Chinese: 曹汝霖; Wade–Giles: Tsao Ju-lin; January 23, 1877 – August 1966, Midland, Michigan, United States) was Vice-Minister of Foreign Affairs of the Beiyang Government, and an important member of the pro-Japanese movement in the early 20th century.
He was a Shanghai lawyer working in Beijing when he was appointed by the provisional president, Yuan Shikai, to a vacant seat in the National Assembly's senate in 1913.
Cao Rulin was part of the Chinese envoy attending the Paris Peace Conference.
This caused a great deal of unrest in China resulting in a student demonstration on May 4, 1919 outside Tiananmen.
The demonstration shifted and Cao Rulin's house, at 3 Front Zhaojialou Lane in the East City District, was burned down.