Gaidifer (Gadifer) d'Avion (fl. 1230–50) was an Artesiantrouvère from Avion. He entered the Church and was associated with the poets of the so-called "School of Arras".
Besides his two jeux, Gaidifer wrote seven chanson courtoises, six of which appear only in the Rome Chansonnier. His style is described as "sharply circumscribed": all his poems are isometric and octo- or decasyllabic. All his simple melodies are in bar form, but spanning wide ranges (often an octave or higher). In Tant ai d'amours, which served as a model for Lambert Ferri (J'ai tant d'amours apris et entendu) and Adam de la Bassée (Ave rosa rubens et tenera), there is repetition in the cauda. One piece, Tout me samble, does not survive with its music.