Arnulf (died 1003) was the bishop of Orléans from 970 until his death. He is known for his feud with Abbo of Fleury, and his denunciation of the papacy. Arnulf was the nephew of , the previous bishop, succeeding to the see on his death in 970. He was known as a strong supporter of Hugh Capet, who took over as ruler of West Francia. Abbo, who became abbot of Fleury in 988, offended Arnulf by his vigorous advocacy of the rights of monasteries. Their power struggle is documented from Abbo's side in his works. Arnulf's only surviving work, De cartillagine (On cartilage), is a response to Abbo's Apologeticus and was written in the aftermath of a riot that broke up the council of Saint-Denis in 993.