Ni Guangjiong (Chinese: 倪光炯; born December 29, 1934 in Ningbo, Zhejiang) is a Chinese physicist and science writer. He began studies in physics about 1950, and became a Doctor of Philosophy in 1955. He married Su Qing, a physics professor, in 1960. He published his first book in 1978. He holds a Chair in Physics at Fudan University, Shanghai. He is the director of Modern Physics Institute and the head of the Division for Theoretical Physics.