The Treaty of Finckenstein (Persian: عهدنامه فین‌کنشتاین), often spelled Finkenstein, was a treaty concluded between France and Iran (Persia) in the Finckenstein Palace (now Kamieniec, Poland) on 4 May 1807 and formalised the Franco-Persian alliance.

Napoleon also promised to furnish the Shah with arms, officers and workmen.

France on its side required the Shah to declare war against the United Kingdom, to expel all British people from Persia, and to maintain an open way if France wanted to attack British possessions in the far east.

Despite the treaty, France failed to achieve diplomatic success in Persia, and none of its provisions were fully implemented.

[2] On 12 March 1809, the United Kingdom signed a treaty with Persia forcing the French out of that country.