Mostafa Moeen (Persian: مصطفی معین; born 1 April 1951 in Najafabad, Isfahan) is an Iranian politician, professor of pediatrics, and a human rights activist who is currently founder and president of the Front for Human Rights and Democracy in Iran.

His campaign enjoyed the support of some reformist parties and organizations, headed by the Islamic Iran Participation Front (IIPF).

Currently, he is the director of Immunology, Asthma and Allergy Research Institute, affiliated to Tehran University of Medical Sciences (TUMS).

On October 12, 2004, Mir-Hossein Mousavi declined to run for the presidency, causing the Islamic Iran Participation Front to consider Moeen instead.

Moeen's present campaign was headed by Ali Shakouri-Rad, and he was supported by the following political parties and organizations: Mostafa Moin is one of the leading Iranian researchers in the field of pediatric immunology and allergy.