A Franco-Persian alliance or Franco-Iranian alliance was formed for a short period between the French Empire of Napoleon I and Fath Ali Shah against Russia and Great Britain between 1807 and 1809. The alliance was part of a plan to gather extra aid against Russia and by Persia's help, having another front on Russia's southern borders, namely the Caucasus region. The alliance unravelled when France finally allied with Russia and turned its focus to European campaigns.
Due to the traditional friendly relations of France with the Ottoman Empire formalized by a long-standing Franco-Ottoman alliance, the relations of France with Iran had long been minimal. Instead, a Habsburg-Persian alliance had developed during the 16th century, and when Persian embassies visited Europe with the Persian embassy to Europe (1599–1602) and the Qagarie embassy to Europe (1609–1615), they pointedly avoided France.
Later however, France developed relations with Iran and signed treaties in 1708 and 1715 with the visit of an Iranian embassy to Louis XIV, but these relations ceased in 1722 with the fall of the Safavid dynasty and the invasion of Iran by the Afghans.
Attempts to resume contact were made following the French revolution, as France was in conflict with Russia and wished to find an ally against that country. In 1796, two scientists, Jean-Guillaume Bruguières and Guillaume-Antoine Olivier, were sent to Iran by the Directoire, but were unsuccessful in obtaining an agreement.