The Jaiminiya Upanishad Brahmana (JUB) is a Vedic text associated with the Jaiminiya shakha of the Samaveda. It may be considered a very early Upanishad, together with the Bṛhadāraṇyaka and Chāndogya Upanishads dating to the Brahmana period of Vedic Sanskrit, likely predating the 6th century BC.

It is not to be confused with the Jaiminiya Brahmana (JB), the actual Brahmana commentary of the Jaiminiya school.