This paper presents the results of the 1987 and 1992 ecological studies on the macrobenthic community in the rocky coastal waters off Ling Shan Island.In the two surveys 49 species of macrobenthos were collected with scuba.They included seaweeds (9), seagrasses (1), molluscans (18), echinodermates (7),crustaceans (10) and other invertebrates (4). Zostera marina, Asterina pectinifera and Chlorostoma rustica were dominant species in these two surveys. Hemicentrotus pulcherrimus was abundant in 1987, but its number decreased in 1992. The number of Stichopus japonicus and Haliotis discus hannai decreased more remarkably in 1992 than 1987, because of. increased. over-fishing. The biomass of macrobenthos was high, being X=740 g/㎡. The biomass of seaweeds, echinodermates and molluscans were 538.1 g/㎡, 181.5 g/㎡ and 19.3 g/㎡ respectively and constituted 72.7%, 24.5% and 2.6% of the total biomass respectively.The biomass of other group was lower.