Pura Ulun Danu Bratan, or Pura Bratan, is a major Shivaite and water temple on Bali, Indonesia — the other major water temple being Pura Ulun Danu Batur. The temple complex is located on the shores of Lake Bratan in the mountains near Bedugul. Water temples serve the entire region in the outflow area; downstream there are many smaller water temples that are specific to each irrigation association (subak).

Built in 1663, this temple is used for offerings ceremony to the Balinese water, lake and river goddess Dewi Danu, due to the importance of Lake Bratan as a main source of irrigation in central Bali. The 11 stories of pelinggih meru dedicated for Shiva and his consort Parvathi. Buddha statue also present inside this temple.