Hsu Szu-chien (Chinese: 徐斯儉; pinyin: Xú Sījiǎn) is a Taiwanese political scientist who has served as the Deputy Secretary-General of Taiwan's National Security Council since 11 June 2020.

in political science from National Taiwan University in 1985, then completed advanced studies in the United States, where he earned a M.A.

[1] Upon returning from the United States after completing his PhD, Hsu became an assistant professor in the Institute of Mainland China Studies of Chinese Culture University in 1997–1998.

He then joined Academia Sinica and became the assistant research fellow of the Preparatory Office for the Institute of Political Science in 2003-2012 and of the Institute of Political Science in 2012–2017.

In 2003, he joined National Tsing Hua University to become assistant professor of the Master Program of China Studies until 2017.