3-Iron is a 2004 South Korean-Japanese romantic drama film written, produced and directed by Kim Ki-duk. An international co-production between South Korea and Japan, the film stars Jae Hee as a young drifter who develops a relationship with an abused housewife. The film's title is derived from a type of golf club used prominently throughout the narrative.

Kim Ki-duk was a South Korean film director and screenwriter, noted for his idiosyncratic art-house cinematic works. His films have received many distinctions in the festival circuit, rendering him one of the most important contemporary Asian film directors.