Aribo (c. 990 - 6 April 1031) was the Archbishop of Mainz from 1021 until 1031. Aribo was a son of the Count Palatine Aribo I of Bavaria. As a member of the Aribonen, Aribo was probably educated in Salzburg. In 1020 Emperor Henry the Saint appointed Aribo as a deacon in his court chapel. In December 1021 he was appointed by Henry the Archbishop of Mainz. On 8 September 1024 he crowned Conrad the Elder of Franconia the king of Germany. Conrad transferred to Aribo the Arch-Chancellorship of Italy, thus making Aribo the arch-chancellor of the enire empire as archbishop of Mainz he was already the arch-chancellor of Germany. Due to legal controversy, Aribo gave the Archbishop of Cologne the right to crown Conrad properly, thus beginning the slow transfer of this privilege to Cologne.