Thommo Reachea IV

Thommo Reachea IV (ព្រះបាទសម្តេចធម្មោរាជា ទី៤) (1706–1747), born Ang Em, was a Cambodian king during Post-Angkor Period (r. 1747).

Thommo Reachea IV was a son of Thommo Reachea III. He ascended the throne after his father's death in 1747. He struggled for power with his brother Ang Hing and brother-in-law Ang Tong. In the same year he was murdered by Ang Hing; then Ang Hing was murdered by Ang Tong.