Synchronous spectrofluorimetry was carried out for the simultaneous determination of various polycyclic aromatic hydrocarbons(PAHs) in aqueous solution by fluorescence spectrometry have been studied. The optimal wavelength interval(${ riangle}{lambda}$) for synchronous spectra of acenaphthene, anthracene, benzo[a]anthracene, fluorene and pyrene were investigated in the presence of surfactants. The great enhancement of the fluorescence of these PAHs in Triton X-100 was obtained and optimal wavelength was 50 nm. The calibration curves in synthetic mixture solution of 5 PAHs were linear over the range from $1.0{ imes}10^{-8}M$ to $1.0{ iems}10^{-4}M$. Under the optimal experimental conditions, the detection limits were $4.9{ iems}10^{-9}M$,;7.0{ imes}10^{-9}M,;4.7{ iems}10^{-9}M,;1.6{ iems}10^{-9}M$</TEX> and $3.2{ iems}10^{-9}M$ for acenaphthene, anthracene, benzo[a]anthracene, fluorene and pyrene, respectively.