A new species of Southeast Asian Cnemaspis is described from the rocky foothills in the northwestern section of the Cardamom Mountains, Cambodia on the basis of a light colored chevron marking between the shoulders, tail tip white with black speckling, and several scale characteristics. This population's overall morphological similarity to southern Vietnam species demonstrates that Cambodia is an important biogeographical link between disjunct components of the Indochinese herpetofauna. This species represents the second known species of Cnemaspis from Cambodia and the ninth endemic species to be described from the Cardamom Mountains, highlighting the need for additional fieldwork in this area of Indochina.