Poster designed by Kitho
|Directed by||K. S. Sethumadhavan|
|Produced by||Rosamma George|
|Written by||M. T. Vasudevan Nair|
|Starring||Balan K. Nair|
|Music by||M. B. Sreenivasan|
|Edited by||G. Venkitaraman|
|Distributed by||Angel Films|
Oppol (English: Elder Sister) is a 1981 Malayalam-language film, written by M. T. Vasudevan Nair and directed by K. S. Sethumadhavan. The film was based on a short story of the same name written by M. T. in 1975. Balan K. Nair won the National Film Award for Best Actor in 1980 for this film.
The film revolves around Malu (Menaka), her younger brother Appu (Aravind) and Malu's husband Govindan (Balan K. Nair). Malu and 6-year old Appu were living together. When Malu is married to Govindan, an ex-military officer, she takes Appu with her to Govindan's house. Govindan is a bit annoyed, but adjusts to the situation to win over his wife, who is much younger than him. Appu, on the other hand, becomes jealous of Govindan and worries he will isolate him from his dear sister. He attacks Govindan during honeymoon and Malu scolds him. The boy runs away from the house and Malu becomes distressed. Towards the end it is revealed that Appu is actually the son of Malu. When Govindan discovers the truth, he tirelessly searches for the boy and brings him back.
|1||"Chaattal Mazhayum"||Chorus, Malathi, Latha Devi||P. Bhaskaran|
|2||"Ettumaanoorambalathil Ezhunnallathu"||S. Janaki||P. Bhaskaran|
|3||"Ettumanoorambalathil" (Plain) (Bit)||S. Janaki||P. Bhaskaran|
|4||"Pottikkaan Chennappol"||K. J. Yesudas||P. Bhaskaran|
- National Film Award for Best Actor for Balan K. Nair 
- National Film Award for Best Child Artist for Aravind 
- National Film Award for Best Female Playback Singer for S. Janaki (song: "Ettumanoor Ambalathile") 
- Kerala State Film Award for Best Film
- Kerala State Film Award for Best Director for K. S. Sethumadhavan.
- Hariharan Balakrishnan (1 June 2008). "Sense and sensitivity". The Hindu.
- "Oppol". MalayalaChalachithram. Retrieved 17 October 2014.
- "Oppol". malayalasangeetham.info. Retrieved 17 October 2014.
- Ojha, Rajendra (1998). Screen World Publication presents National film award winners: 1953-1997. Screen World Publication. p. 148.
- K. Pradeep (29 June 2007). "Timeless voice". The Hindu.