Thihathu of Ava (Burmese: သီဟသူ, pronounced [θìha̰ðù]; also known as Aung Pinle Hsinbyushin Thihathu; 1394–1425) was king of Ava from 1421 to 1425. Though he opportunistically renewed the Forty Years' War with Hanthawaddy Pegu in 1422, Thihathu agreed to a peace treaty with Prince Binnya Ran in 1423. His subsequent marriage to Ran's sister Princess Shin Saw Pu helped keep the peace between the two kingdoms when Ran became king of Pegu in 1424.