Mojtaba Mirtahmasb (Persian: مجتبی میرطهماسب; born in 1971) is an Iranian filmmaker and film producer.

At school he was primarily interested in Shiite rituals and ceremonies, but also studied photography and filmmaking.

After graduating Mirtahmasb directed nine documentaries for the Islamic Art and Material Culture of Iranian Shiism in 1996 and 1997.

During this period he also directed three short videos during his military service called The Story of Khoramshahr, Motherland, and Stars.

He has worked with Iranian film directors Kambozia Partovi, Mohsen Makhmalbaf and Afghan filmmaker Siddiq Barmak.