A group of wood frog which were collected in Zhalantun, Hulunbuir City, Inner Mongolia, China in April 2016, was identified as the Chinese Brown Frog (Rana chensinensis) according to the morphological traits (Fig. 1, Table 1) and molecular biological analysis (Fig. 2). These evidences reconfirm that Hulunbuir, Inner Mongolia is within the distribution range of this forg species.