Chiang Nai-shin (; born 24 September 1948) is a Taiwanese politician. He served in the Taipei City Council from 1982 to 2009, when he was elected to the Legislative Yuan.
After graduating from National Chengchi University with a bachelor's degree in accounting and business, Chiang attended Tatung University, where he earned a master's degree in business administration.
Chiang was elected to the Taipei City Council in 1981 and served until 2009. After Diane Lee resigned her legislative seat in January 2009, Chiang won a four-way primary held on 8 February to represent the Kuomintang in the resulting by-election. He subsequently defeated six other candidates in the by-election held on 28 March.
The Democratic Progressive Party nominated retired baseball player to run against Chiang in 2012. During his 2016 campaign, Chiang was first opposed by Freddy Lim, a member of the New Power Party, who soon ceded the race to fellow candidate of the Social Democratic Party. Chiang easily defeated Fan and Minkuotang candidate Wu Hsu-chih.