Forty-one species belonging to 23 genera in the tribe Olethreutini were recorded. Of those, thirty-three were known species and eight species : Arcesis anax Diakonoff, Dactylioglypha pallens Diakonoff, Dudua charadraea (Meyrick), Megalota fallax (Meyrick), Neopotamia cathemacta Diakonoff, Semutophila saccharopa Tuck, Sorolopha archimedias (Meyrick), and Sorolopha stygiaula Meyrick were recorded from Thailand for the first time. All species were collected during 2001-2004 in different habitat types of Thong Pha Phum National Park, Kanchanaburi Province, Thailand.