Alain Blanchard (born 14th century, executed in Rouen in 1419) was a commander of the crossbowmen of Rouen during the Hundred Years' War. He was active in the defence of the city during its siege by king Henry V of England. His habit of hanging English captives from the walls of the city incurred the wrath of the English. When the city capitulated on 20 January 1419 Henry demanded that three notable inhabitants be surrendered to be decapitated. One of them was Alain Blanchard.