The distribution and diversity of benthic invertebrates were investigated in the sea of Taean from June 30 to August 24 2008. As a result, 61 species, 42 families, 19 orders, 13 classes, and 8 divisions were found living in the intertidal area of Taean while 41 species were observed in Malipo, 28 species in Tonggaehang, 28 species in Wonan Beach, 24 species in Dereunihang, 22 species in Euihang, 22 species in Jinsan-ri, 21 species in Sindu-ri, 20 species in Yongsin-ri, 13 species in Songhyun 1-ri and 6 species in Jeongdang 3-ri. By the diversity of divisions, arthropods (23%) and echinoderms (10%) represented 51 percent of the total invertebrates.