A temple garment, also referred to as garments, the garment of the holy priesthood, or Mormon underwear, is a type of underwear worn by adherents of the Latter Day Saint movement after they have taken part in the endowment ceremony. Garments are required for any individual who previously participated in the endowment ceremony to enter a temple. The undergarments are viewed as a symbolic reminder of the covenants made in temple ceremonies and are seen as a symbolic and/or literal source of protection from the evils of the world.

The garment is given as part of the washing and anointing portion of the endowment. Today, the temple garment is worn primarily by members of the Church of Jesus Christ of Latter-day Saints (LDS Church) and by members of some Mormon fundamentalist churches. Adherents consider them to be sacred and not suitable for public display. Anti-Mormon activists have occasionally publicly displayed or defaced temple garments to express their opposition to the LDS Church.

Temple garments are sometimes derided as "magic underwear" by non-Mormons, but Mormons view this terminology to be both misleading and offensive.