The Thermidorian Reaction is a revolt in the French Revolution against the excesses of the Reign of Terror.

It is triggered by a vote of the National Convention to execute Maximilien Robespierre, Louis Antoine de Saint-Just and several other leading members of the Terror.

This ends the most radical phase of the French Revolution.The name Thermidorian refers to 9 Thermidor Year II (27 July 1794), the date according to the French Revolutionary Calendar when Robespierre and other radical revolutionaries come under concerted attack in the National Convention.

Thermidorian Reaction also refers to the remaining period until the National Convention is superseded by the Directory; this is also sometimes called the era of the Thermidorian Convention.

Prominent figures of Thermidor include Paul Barras, Jean-Lambert Tallien and Joseph Fouché.