Kim Chang-ju (Korean: 김창주; born 1972) is a South Korean film editor and director. He started working in editing department of 2005 film Welcome to Dongmakgol. He edited films with directors Bong Joon-ho (Snowpiercer (2013)), Kim Seong-hun (A Hard Day (2014) and Tunnel (2016)), Park Hee-gon (Fengshui), Park Hoon-jung (V.I.P. (2017), The Witch: Part 1. The Subversion (2018)) and Cheon Myeong-kwan (Hot Blooded (2022)) among others. As of May 2022, Kim has edited more than 60 films and 2 TV series Athena: Goddess of War (2010), Kingdom (2019–20). Kim made his directorial debut in 2021 thriller film Hard Hit.