Red Line (Finnish: Punainen viiva) is a 1959 Finnish drama film directed by Matti Kassila. The screenplay by Kassila is based on the 1909 novel of the same name by Ilmari Kianto. The film was entered into the 1st Moscow International Film Festival; however, the reception at the film festival was poor due to the exaggerated character of a social democratic agitator (played by Jussi Jurkka) and weak quality of the film's subtitles.

In 1959, the film won five Jussi Awards in the following categories: Best Screenplay (Matti Kassila), Best Original Score (Osmo Lindeman), Best Actor (Holger Salin), Best Supporting Actor (Jussi Jurkka) and Best Supporting Actress (Rakel Laakso).