The Prime Minister of Cambodia (Khmer: នាយករដ្ឋមន្ត្រីនៃព្រះរាជាណាចក្រកម្ពុជា) is the head of government of Cambodia. The prime minister is also the chairman of the Cabinet and leads the executive branch of the Royal Cambodian Government. The prime minister is required to be a member of parliament, and is appointed by the monarch for a term of five years. Since 1945, there have been 36 prime ministers.
Source: Wikipedia (d.d. December 8th 2017)