Hsu Hsin-liang (Chinese: 許信良; pinyin: Xǔ Xìnliáng; Pe̍h-ōe-jī: Khó͘ Sìn-liông; born 27 May 1941) is a Taiwanese politician, formerly Chairman of the Democratic Progressive Party (DPP).

In 1986, soon after the founding of the Democratic Progressive Party, he tried to return to Taiwan via Japan, but was repeatedly blocked at Chiang Kai-shek International Airport.

[5] Three years later he was arrested while slipping into Taiwan aboard a mainland Chinese fishing boat and was jailed for sedition until president Lee Teng-hui pardoned him in 1990.

Hsu believes that maintaining a good relationship with the People's Republic of China is vital for Taiwan's survival and growth, and there is no hurry to negotiate with mainland on political issues at the present.

In March 2004, Hsu and a dozen other prominent politicians involved in the Tangwai movement published The Joint Declaration of the Tang Wai participants (黨外人士聯合聲明, the joint declaration of the participants outside of the political party movement), in which they reprimanded Chen Shui-bian for betraying the ideals of democracy and freedom that they once pursued.

However, after the KMT won a two-thirds majority of seats in the Legislative Yuan in 2008, Hsu became concerned about the party reverting to authoritarianism.

Hsu then came out to support DPP candidate Frank Hsieh in the 2008 presidential election even though he had been connected with the pan-blue coalition camp during much of the period Chen Shui-bian served as president.