Saddha Tissa was the king of Anuradhapura (Sri Lanka) from 137 BC to 119 BC. Saddha Tissa was the son of Kavan Tissa of Ruhuna and the brother of Dutthagamani. He was the ruler of Digamadulla, the present day eastern province of Sri Lanka.
Since crown prince Saliya married a Chandala girl, King Dutugamunu’s younger brother, Saddha Tissa was consecrated as King. King Saddha Tissa continued the remaining work in Mahathupa.
During Saddha Tissa's reign, there was a major fire in the Lovamahapaya. The king subsequently reconstructed the Lowa Maha Paaya at one third of the cost with seven levels, two less than before.
King Saddha Tissa built the Dighavapi vihara and the Duratissa reservoir. The Duratissa reservoir has an embankment long and high. The top of the bank is wide. The reservoir has a capacity of and a surface area of .
After King Saddha Tissa’s death, Mahasangha supported the second son of the king, Thulatthana.