Jean I Le Maingre, also called Boucicaut (c. 1310 – 15 March 1367), Marshal of France, was a 14th century French noble.

In June 1340, Meingre accompanied the expedition of John, Duke of Normandy at the head of an army, attempting by force to capture the town of Valenciennes, Hainaut.

On 2 September 1345, he accompanied Humbert, Dauphin of Viennois from Marseilles on a crusade against the Aydınids who were besieging Smyrna.

Boucicaut led an army that captured the towns of Mantes and Meulan from King Charles II of Navarre.

He took part in the expedition against the French free companies and replaced Bertrand Du Guesclin, in command of the troops of Normandy.