Elchin Musaoglu [Guliyev] (Azerbaijani: Elçin Musaoğlu [Quliyev]; born 11 July 1966, in Baku, Azerbaijan) is an Azerbaijani filmmaker best known for his award-winning movie The 40th Door and Oscar contender Nabat.

[1] Musaoglu is a member of the Union of the Azerbaijan Cinematographers and the Union of Turkish Documentary Cinematographers, and a founder of the Society for Support of the Development of Documentary Films and Authorial Programs.

Although Musaoglu's father, Musa Guliyev, was a professor of historical sciences, Musaoglu spent his youth in the villages of Azerbaijan where he made theatrical performances with other youths often accepting fruit in lieu of payment.

Peter Debruge from Variety said: "'The 40th Door' is no Hollywood-style rags-to-riches tale, offering instead a stripped-down neorealist fable in the vein of Vittorio De Sica and the strong Iranian films of a decade ago.

There may be something overly familiar about such stories by now, and yet this one feels fresh and free from cliche, a touching portrait with the potential for modest arthouse returns.”[2] Musaoglu's 2014 film Nabat was Azerbaijan's entry for Academy Awards in 2015.