A new species of the doryctine genus Sonanus Belokobylskij & Konishi, 2001, S. tselikhae sp. nov., is described and illustrated from the South Korea. For the first time, the photographs of the type species of the genus Sonanus, S. senzuensis Belokobylskij & Konishi, 2001, are provided. A key to the known Asian species of this genus is also provided.