Pierre Chan Pui-yin (born 18 August 1976) is a Hong Kong medical doctor and politician.

Chan joined Ruttonjee Hospital as an associate consultant of gastroenterology and hepatology.

In 2014, Chan was appointed by the government to several public boards, including the Steering Committee on Review of the Hospital Authority until 2015.

He remained in office when, in November 2020, almost all pro-democracy Legislative Councillors resigned in protest at the disqualification of four of their number under the new national security law,[4] but voted against the subsequent introduction of a heavily restrictive "patriots-only" election process.

Following those changes, Chan declined to stand again and returned to his gastroenterology practice in a public hospital.