Balthasar Hubmaier, also Hubmair, Hubmayr, Hubmeier, Huebmör, Hubmör, Friedberger, Latin: Pacimontanus (c. 1480 – 10 March, 1528) was an influential German/Moravian (Schwertler) Anabaptist leader. He was one of the most well-known and respected Anabaptist theologians of the Reformation.
He was born in Friedberg, Bavaria (about five miles east of Augsburg), around 1480. Information on his parentage is lacking.
He attended Latin School at Augsburg, and entered the University of Freiburg on 1 May 1503. Insufficient funds caused him to leave the university and teach for a time at Schaffhausen. He returned to Freiburg in 1507 and received both a bachelor's and a master's degree in 1511. In 1512, he received a doctor's degree from the University of Ingolstadt under John Eck, and became the university's vice-rector by 1515. Hubmaier's fame as a pulpiteer was widespread. He left the University of Ingolstadt for a pastorate of the Catholic church at Regensburg in 1516. In 1521 he went to Waldshut. In 1524, he married Elizabeth Hügline from Reichenau.
In 1522 he became acquainted with Heinrich Glarean, (Conrad Grebel's teacher) and Erasmus at Basel. In March 1523, in Zürich, Hübmaier met with Huldrych Zwingli, and even participated in a disputation there in October of that same year. In the disputation, he set forth the principle of obedience to the Scriptures, writing, “In all disputes concerning faith and religion, the scriptures alone, proceeding from the mouth of God, ought to be our level and rule.” It was evidently here that Hübmaier committed to abandoning infant baptism, a practice he could not support with Scripture. He held that even where the Scriptures appear to contain contradictions, both truths are to be held simultaneously.