Jacob Senleches (fl. 1382/1383 – 1395) (also Jacob de Senlechos [i.e. Senleches] and Jacopinus Senlesses) was a Franco-Flemish composer and harpist of the late Middle Ages. He composed in a style commonly known as the ars subtilior. Despite the small number of transmitted compositions, Jacob de Senleches is counted among the central personalities of Ars subtilior. He developed many distinctive rhythmic and notational innovations. The texts deal mainly with himself and his career.