| Honorific-Prefix: | Somdet Phra |
| Ariyavamsagatañāṇa (Sa Pussadeva) | |
| Honorific-Suffix: | Somdet Phra Sangharaja |
| Birth Name: | Sa |
| Dharma Names: | Pussadevo |
| Birth Date: | 19 August 1812 |
| Birth Place: | Nonthaburi, Thailand |
| Death Place: | Bangkok, Thailand |
| Nationality: | Thai |
| Religion: | Buddhism |
| School: | Theravada, Dhammayuttika Nikaya |
| Office1: | Supreme Patriarch of Siam |
| Term Start1: | 29 November 1893 |
| Term End1: | 11 January 1900 |
| Predecessor: | Pavares Variyalongkorn |
| Successor: | Vajirananavarorasa |
Somdet Phra Ariyavangsagatayana Somdet Phra Sangharaja (known also as Ariyavangsagatayana II) was the 9th Supreme Patriarch of Thailand 1893–1899. He was born in 1812 in the Nonthaburi Province as Sa Pussadeva. Prior to becoming supreme patriarch, he was the abbot of Wat Ratchapradit. He succeeded Pavares Variyalongkorn as Patriarch in 1893. He died aged 87 years in 1899 and was succeeded by Vajirananavarorasa.