The Most Venerable Bhaddanta Āciṇṇa Mahāthēra (ဘဒ္ဒန္တအာစိဏ္ဏ), more commonly referred to as the Pa-Auk Sayadaw (Burmese: ဖားအောက်ဆရာတော်; MLCTS: Hpa:auk Hca.ratau.

), is a Burmese Theravāda monk, meditation teacher and the abbot of the Pa-Auk Forest Monastery in Mawlamyine.

Immersed in the study of the Pāli Canon from his days as a novice, he gradually broadened his scope of attention to include meditation, initially training under Mahasi Sayadaw and U Paṇḍitā.

[5] On July 21, 1981,[6] Most Venerable Āciṇṇa Mahāthēra succeeded the Phelhtaw Sayadaw Aggapañña,[6] at the latter's invitation, as the abbot of the Pa-Auk Forest Monastery.

[8] In May 2017, Āciṇṇa was conferred an honorary doctorate of philosophy from Mahachulalongkornrajavidyalaya University in Bangkok, Thailand.