Zhang Sizhi (Chinese: 张思之; pinyin: Zhāng Sīzhī; 12 November 1927 – 24 June 2022) was an active rights lawyer in China, and a professor at Central University of Finance and Economics.

[4] His father was a doctor who practiced Chinese traditional medicine.

During the Anti-Rightist Movement, he was divided into right, was sentenced to 15 years in a village.

In July 1979, Zhang returned as a lawyer and participated in the trials of "Lin Biao Anti-Revolutionary Group Case" and "Jiang Qing Anti-Revolutionary Group Case", commonly known as the "Two Cases", serving as defense lawyers for Jiang Qing and others.

[6][7] After the 1989 Tiananmen Square protests and massacre, he defended liberals such as Bao Tong, Wang Juntao, Gao Yu and Pu Zhiqiang, as well as rights lawyers.