Oasis (Korean: 오아시스) is a 2002 South Korean psychological drama romance film directed by Lee Chang-dong. The film's plot tells about the difficult romance between a mildly mentally disabled man who has just been released from jail after a 2+1⁄2-year sentence for involuntary manslaughter and a woman with severe cerebral palsy. Starring in these roles are Sul Kyung-gu and Moon So-ri, who played the couple in Chang-dong's previous film, Peppermint Candy (1999). The movie also shows how the two main characters are treated by their families and perceived by the people around them.

The film was a critical success, earning prizes in numerous film festivals. Among the most important were Silver Lion for Best Direction and the Special Director's prize given to Lee Chang-dong at the 2002 Venice Film Festival and the Marcello Mastroianni Award for Emerging Actor or Actress given to Moon So-ri at the same event.