The article considers the activities of the Guardian Council — a body of religious and constitutional control over adopted laws in Iran — in the field of control over the election of the President of Iran and members of Parliament — the Majlis of the Islamic Council. As a result of the study, the author came to the conclusion, that the greatest importance of the Guardian Council in the course of election control is realized in the form of determining the compliance of candidates with rather vague moral, ideological and religious criteria established in Iranian legislation.