Portrait of a Man with a Blue Chaperon is a very small oil on panel portrait of an unidentified man attributed to the Early Netherlandish painter Jan van Eyck.

Jan van Eyck was a Flemish painter active in Bruges who was one of the early innovators of what became known as Early Netherlandish painting, and one of the most significant representatives of Early Northern Renaissance art. According to Vasari and other art historians including Ernst Gombrich, he invented oil painting, though most now regard that claim as an oversimplification.