Lan Shui (Chinese: 水蓝, born 1957) is an American conductor. He was the Music Director of the Singapore Symphony Orchestra from 1997 to 2019. He has retired as Music Director on 26 January 2019, and was given the title of Conductor Laureate by chairman of the SSO Mr Goh Yew Lin.

Born in Hangzhou, China, Shui is the son of a doctor and a banker. He began his musical studies on violin, but the Cultural Revolution interrupted his violin studies, and a subsequent football injury ended his dreams of becoming a violinist. At the Central Conservatory of Music in Beijing, he focused on conducting and composition, and worked regularly with the Beijing Symphony Orchestra. He continued his musical studies in the US at Boston University and Tanglewood, where his instructors included Michael Charry, David Hoose, and classes at Tanglewood with Leonard Bernstein. He served as an assistant conductor with the Baltimore Symphony Orchestra, and associate conductor with the Detroit Symphony Orchestra.

Choo Hoey invited Shui to the Singapore Symphony Orchestra (SSO) in 1993. Shui succeeded Hoey as music director in 1997. His work in contemporary music has included leading the world premiere of Bernard Tan's Violin Concerto in January 2006, with the orchestra's leader Lynnette Seah as soloist. With the SSO, Shui has made commercial recordings for the BIS label. From 2007 to 2015, he was chief conductor of the Copenhagen Philharmonic. He was formerly principal guest conductor of the Aalborg Symphony Orchestra. He also appears semi-regularly with the National Taiwan Symphony Orchestra.