The investigation of landsnail resources in the middle Taiwan from January to December in 2005, landsnails were collected from 99 sampling areas. They are classified into 4 orders, 22 families and 78 species, but also collected 3 unknown slug species. Among 22 landsnail families, Bradybaenidae and Cyclophoridae were collected 12 and 10 species respectively; Helicarionidae and Diplommatinidae were also collected 9 and 8 species respectively. Among 78 landsnail species, Bradybaena similaris, Coniglobus nux, Achatina fulica and Aegista fulvicans were the most widely distributed.