| Ang Em | |
| Succession: | King of Cambodia |
| Reign: | 1700–1701 |
| Predecessor: | Chey Chettha IV |
| Successor: | Chey Chettha IV |
| Reign1: | 1710–1722 and 1729-1730 |
| Predecessor1: | Thommo Reachea III |
| Successor1: | Satha II |
| Issue: | Satha II, Princess Peou |
| House: | Varman Dynasty |
| Father: | Ang Nan |
| Full Name: | Preah Bat Samdech Barom Ramadhipati Kaev Hua III Chey Chettha V |
| Birth Name: | Ang Em |
| Birth Date: | 1674 |
| Death Date: | 1731 |
| Religion: | Buddhism |
Kaev Hua III or Chey Chettha V (Central Khmer: បរម រាមាធិបតី) (1674 - 1731), born Ang Em, was a Cambodian king in the early 18th century (r. 1700 - 1701, 1710 - 1722, 1729 - 1730).
Ang Em was a son of vice king Ang Nan. In 1700, a Vietnamese army under Nguyễn Hữu Cảnh invaded Cambodia, he was installed as the king by Vietnamese. In the next year, Chey Chettha IV surrendered, and was allowed to restore. Ang Em was deposed.
Chey Chettha IV abdicated in favour of Thommo Reachea III in 1702. Chey Chettha IV married a daughter to Ang Em; this was a political marriage. However, Thommo Reachea III drove out Ang Em with the help of Ayutthaya Kingdom. Ang Em fled to Saigon in 1705, and sought help from Vietnamese Nguyễn lord. He came back to Longvek with Vietnamese army. In 1710, Ang Em ascended the throne.
In 1714, Thommo Reachea III captured Longvek with the help of Ayutthaya Kingdom. Ang Em was in dangerous. A Vietnamese army under Trần Thượng Xuyên and Nguyễn Cửu Phú (阮久富) was sent to Cambodia to help Ang Em. Thommo Reachea III and Chey Chettha IV were defeated and fled to Ayutthaya Kingdom.[1] [2]
In 1722, Ang Em abdicated in favour of his son Satha II.In 1729, he resumed the government and was crowned as supreme king xith the title of Chey Chettha V. He reigned for six months and then abdicated a second time in favour of his eldest son, Satha II (1730).