The result of Surin islands expedition, we found 6 orders and 11 species of millipedes. It shows that the islands have a great millipede diversity compare with the limited and isolated area. Among 11 species discovered, at least 2 species seem to be new to science and the most of species are endemic organism found only on the islands. Surin island earthworms are 3 species which consist of 2 endemic and 1 common global introduced species. In addition, we also found the first record of sandy beach earthworm species (Pontodrilus sp.) that it seems to be a new species. Another expedition at Samaesarn islands of Chonburi province, there are 5 species recorded and found that 2 species are dominant (Spirobolu sp. and Sphaerotherium sp.). These 2 species are also existed on the mainland nearby Samaesarn islands. Therefore, 2 species of earthworm are reported which are one endemic and one introduces species.