Polynuclear aromatic hydrocarbons $(PAH_s)$ in Seoul atmosphere were isolated and identified. PAH fraction was isolated from airborne suspended particulates by solvent extraction, fractionation and thin layer chromatography. PAHs were identified by GC-MS, capillary GC, retention index and so on. About 70 major $PAH_S$ were seperated in capillary GC and 41 $PAH_s$ of those were identified.