A. K. Sajan is an Indian Malayalam screenwriter and film director who is best known for his directorial debut Stop Violence (2002). The movie had debutant Prithviraj Sukumaran and Chandra Lakshman in the lead roles. He is also best known for scripting many superhits in the industry. His notable works include Dhruvam (1993), Butterflies (1993 film), kashmeeram (1994), Crime File (1999), Chinthamani Kolacase (2006), Nadiya Kollappetta Rathri (2007) and Puthiya Niyamam (2016). His brother AK Santhosh is also a script writer and have scripted various movies like Sooryaputhran, Minnaminuginum minnukettu, and a Tamil – Malayalam bilingual movie Vande Matharam.
Began his film career as a story writer for some movies in late 1980’s. In the early 1990 he pitched the story idea of Dhruvam (1993), and began to pen the script. By mid 1991 with the completed draft he approached Joshiy, and the film started to roll. Dhruvam was a blockbuster in box office and was among the top grossers of 1993. His next movie Butterflies (1993 film) with Mohanlal also turned out to be a blockbuster. In 1994 Kashmeeram (1994) with Suresh Gopi in the lead emerged as a super hit which reaffirmed stardom for Suresh Gopi. From there on, they both established as a pair and later worked on several films together. Their notable films were kashmeeram (1994),Crime File (1999), Chinthamani Kolacase (2006) andNadiya Kollappetta Rathri (2007). His directorial debut was in 2002 with the movie Stop Violence starring Prithviraj Sukumaran in the lead.The movie depicted the life of dark underworld prevailed in the city of Kochi. upon its release it garned critical acclaim for its bold and realistic approach in making.