Apthamitra (transl. Close friend) is a 2004 Indian Kannada-language Psychological horror action film directed by P. Vasu and produced by Dwarakish. It stars Vishnuvardhan, Soundarya and Ramesh Arvind in the lead roles, while Prema, Dwarakish and Avinash appear in supporting roles. The film is a remake of Malayalam film Manichithrathazhu with some plot changes. The film was released on 27 August 2004. It marks the posthumous film for Soundarya in Kannada, released after her death on 17 April 2004.

Apthamitra ran for 365 days in theaters across Karnataka and was the highest ever grossing Kannada movie at that time and was an industry hit. The plot changes from the original film were retained in the Tamil film Chandramukhi (2005). The film was later followed by its sequel titled Aptharakshaka (2010).