This is the first digital Samdech Porthinhean Chuon Nath’s Khmer-Khmer Dictionary to have exact content from the Fifth Edition published in 1967. This work is under the initiative of H.E. Dr. Aun Pornmoniroth, Senior Minister of Economy and Finance with technical and financial supports from the Royal University of Phnom Penh(RUPP) and Electricite Du Cambodge (EDC).