Benzo(a)pyrene [B(a)P], one of the polycyclic aromatic hydrocarbons(PAHs) is know as a potent careinogen. As consumption of lipid food and fried food increases recently, the toxic effect of overheated lipid foods has report increasingly. This study was undertaken to measure the contents of B(a)P and other PAHs of fried chicken and frying oil. At the same time, the rancidities of frying oil and descarded oil were determined. B(a)P and other PAHs contents of all samples were measured by HPLC/UV method. The results obtained were as follows; B(a)P contents of fresh chicken and soybean oil were 0.073 and 0.146 ${mu}$g/kg, respectively. During fried chicken at 180${pm}$5$^{circ}C$ and 200${pm}$5$^{circ}C$, B(a)P and PAHs contens decreased or increased In 20 times fried chicken, PAHs contents except Pyr and DMBA increased at 180${pm}$5$^{circ}C$ and PAHs contents except DMBA, DBA, and 3-MC increased at 200${pm}$5$^{circ}C$. In frying oils fried chicken, PAHs contents increased in 10 and 15 times frying oil at 180${pm}$5$^{circ}C$ and grew more increase and more increase during frying at 200${pm}$5$^{circ}C$. The changing pattern of PAHs contents of frying oils was remotely related that of rancidities of frying oils. In fried chicken, frying oils, and discarded oils obtained from fried chicken house at market, PAHs contents of fried chickens were lower than those of fried chicken cooked at laboratory but those of frying oils and discarded oils were higher than those of frying oils cooked at laboratory.