This study was conducted to evaluate the growth conditions and vegetation of Peucedanum japonicum habitatin uninhabited islands of Incheon Korea. The emergence area of Peucedanum japonicum was 4.9m distance in coastline,and altitude and slope was 7.4m and 47.5%. Soil pH, organic matter and P2O5 of habitat were 7.1, 8.3% and 29.0㎎/㎏, andcontents of K, Ca, Mg and Na were 0.66, 4.9, 3.4 and 1.13cmol+/kg, respectively. Growth plants with Peucedanum japonicumwere total 55 taxa, and Gakeuldo in uninhabited islands was the most as 25 taxa. In growth plants with Peucedanumjaponicum, plants of over 25% frequence per plot were Miscanthus sinensis, Dendranthema boreale, Lilium lancifolium,Hemerocallis middendorffii, Elymus dahuricus, Cirsium japonicum var. maackii, Asparagus schoberioides, Gypsophila oldhamiana,Cocculus trilobus, Silene aprica var. oldhamiana, Artemisia capillaris, Crepidiastrum denticulatum and Sedum oryzifolium.The vegetation of Peucedanum japonicum habitat was classified into Aster spathulifolius community, Miscanthus sinensiscommunity, Dendranthema boreale community, Setaria viridis var. pachystachys community, Cirsium japonicum var. maackiicommunity and Hemerocallis middendorffii community. According to general condition of habitat, suitable growing areaswas determined to slightly acidic from mild alkaline soils.