Spiders of the genus Althepus Thorell, 1898 are found throughout Southeast Asia, notable for their long walking legs. Ten new species are reported in this paper from China, Indonesia, Laos and Myanmar: A.chengmenensis Li & Li, sp. n. (♂♀), A.cheni Li & Li, sp. n. (♂♀), A.gouci Li & Li, sp. n. (♂♀), A.hongguangi Li & Li, sp. n. (♂♀), A.phousalao Li & Li, sp. n. (♂♀), A.qianhuang Li & Li, sp. n. (♂♀), A.qingyuani Li & Li, sp. n. (♀), A.sepakuensis Li & Li, sp. n. (♂♀), A.xuae Li & Li, sp. n. (♂♀) and A.yizhuang Li & Li, sp. n. (♂♀). These species were found in cave entrances and among tree-buttresses, indicating the spiders have a preference for dark and moist environments. All types are deposited in the Institute of Zoology, Chinese Academy of Sciences in Beijing, China (IZCAS).