Michał Kazimierz Heller (born 12 March 1936), also known as Michael Heller, is a Polish philosopher, theoretical physicist, cosmologist, theologian, and Catholic priest. He is a professor of philosophy at the Pontifical University of John Paul II in Kraków, Poland, and an adjunct member of the Vatican Observatory staff.
He also serves as a lecturer in the philosophy of science and logic at the Theological Institute in Tarnów. A Catholic priest belonging to the Diocese of Tarnów, Heller was ordained in 1959. In 2008, he received the Templeton Prize for his works in the field of philosophy.
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