Yau Nai-hoi (Chinese: 游乃海; pinyin: You Naihai) is a Hong Kong filmmaker. He is best known as a frequent screenwriter for films produced by the independent Hong Kong production company Milkyway Image, notably films directed by Johnnie To and Wai Ka-Fai. Yau often collaborates with fellow Milkyway Image writers Wai Ka-Fai, Szeto Kam-Yuen, Au Kin-Yee and Yip Tin-Shing. His directorial debut arrived with the 2007 film Eye in the Sky.

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (June 2022)

• Blind Detective (2013) (writer)
• Drug War (2012) (writer)
• Romancing in Thin Air (2012) (writer)
• Life Without Principle (2011) (writer)
• Don't Go Breaking My Heart (2011) (writer)
• Tactical Unit – Comrades in Arms (2009) (writer)
• Triangle (2007) (writer)
• Eye in the Sky (2007) (director) (writer)
• Election 2 (a.k.a. Triad Election) (2006) (writer)
• Election (2005) (writer)
• Throw Down (2004) (writer)
• Running on Karma (2003) (writer)
• Turn Left, Turn Right (2003) (writer)
• PTU (2003) (writer)
• Love for All Seasons (2003) (writer)
• My Left Eye Sees Ghosts (2002) (writer)
• Fat Choi Spirit (2002) (writer)
• Running Out of Time 2 (2001) (writer)
• Love on a Diet (2001) (writer)
• Wu yen (2001) (writer)
• Needing You... (2000) (writer)
• Help!!! (2000) (writer)
• The Mission (1999) (writer)
• Running Out of Time (1999) (writer)
• Where a Good Man Goes (1999) (writer)
• A Hero Never Dies (1998) (writer)
• Expect the Unexpected (1998) (writer)
• The Longest Nite (1998) (writer)
• Lifeline (1997) (writer)
• A Moment of Romance III (1996) (writer)
• Loving You (1995) (writer)
• The Bare-Footed Kid (1993) (writer)

• Yau Nai-hoi at IMDb