Klaus Gamber (1919–1989) was a German Catholic liturgist.
Author of Die Reform der römischen Liturgie, which was subsequently translated into English and published as The Reform of the Roman Liturgy: Its Problems and Background, he was one of the principal intellectual critics of the liturgical reforms brought under the papacy of Paul VI.
His critical work was praised by Cardinal Joseph Ratzinger and he is credited for being one of the academic inspirations behind the motu proprio Summorum Pontificum, allowing broader use of the 1962 Roman Missal.