Ubertino of Casale (Ubertino di Casale) was an Italian minorite and one of the leaders (together with Michael of Cesena; preceded by Peter Olivi) of the stricter branch of the Franciscan Christian order. For some time he was a chaplain of the cardinal Orsini. He died in 1329, possibly murdered by agents of the Pope John XXII. He wrote the Arbor Vitae Crucifixae Jesu Christi.