Two species of barbastelle live in China, Barbastellabeijingensis and B. darjelingensis. B. darjelingensis is found in Inner Mongolia, Xinjiang, Qinghai, Shaanxi, Gansu, Henan, Hunan, Jiangxi, Sichuan, Chongqing, Yunnan, Guizhou, and Taiwan, while B.beijingensis has only been recorded in Beijing. A male barbastelle was captured by mist net in the forest road of Changyuanhe Wetland Park in Qi County (37°19′15″ N, 112°26′18″ E, 812 m), Shanxi Province, in July 2022. We measured the external morphology and skull characteristics of the captured sample, and amplified the Cyt b and ND1 sequences. With 1 000 bootstrap replicates, phylogenetic trees were reconstructed from Cyt b and ND1 gene sequences by Mega 5.0. The forearm length is 43.7 mm, and the sample had nearly square outline of ears with transverse ridges (Fig. 1). Its ears joined across the forehead, and it had a small lobe on the middle outer edge of each pinna (Fig. 1b, c). This Shanxi sample had a longer 3^rd, a middle 4^th and a shorter 5^th metacarpal lengths (Table 1). The length of skull is 14.6 mm, and it has robust upper and lower premolars (Fig. 2). All morphological measurements were in accord with those from Barbastella beijingensis, except condylo-base length and braincase breadth (Table 1). Cyt b and ND1 sequences from the Shanxi sample showed higher similarities to those of B. beijingensis (Cyt b:99.5%; ND1:98.6% to 100%), than to those of B. darjelingensis (Cyt b:86.3% to 86.9%; ND1:81.6% to 83.3%). The Shanxi sample clustered with B. beijingensis, rather than B. darjelingensis in both cladograms of Cyt b and ND1 genes(Fig. 3). Through comparing external morphology, skull characteristics and molecular data with B. beijingensis and B. darjelingensis, this bat is identified as B. beijingensis, which is a new record for the Chiroptera in Shanxi Province.