阇耶跋摩二世（Jayavarman II，高棉语：ជ័យវរ្ម័នទី២）（约770年—850年）柬埔寨（中国古籍称作真腊）吴哥王朝的第一位国王。他使国家脱离爪哇的统治，恢复了柬埔寨的独立。

8世纪末叶爪哇夏连特拉王朝征服真腊后，当时是王子的阇耶跋摩被带到爪哇，后来作为夏连特拉王朝的封臣回国即位。约801年—802年，阇耶跋摩二世宣布真腊独立，自称转轮王（Cakravartin，意即宇宙之王）。他的国家接受湿婆派为国教。

在阇耶跋摩二世统治时期，真腊的首都并不在吴哥，而是在湄公河下游的磅湛。

Jayavarman II (Khmer:ជ័យវរ្ម័នទី២) (c. 770–835) was a 9th-century king of Cambodia, widely recognized as the founder of the Khmer Empire, which ruled much of the Southeast Asian mainland for more than six hundred years. Historians formerly dated his reign as running from 802 AD to 835 AD. Before Jayavarman II came to power, there was much fighting among local overlords who ruled different parts of Cambodia. The country was not unified under one ruler.