Photophysical and photochemical properties of fifteen benzoxazole fluorescent whitening agenta in N, N'-dimethylformamide (DMP) have been measured. Their fluorescence quantum yields were all over 0.64. Except three compounds containing biphenyl structure, the rest had laser action with laser conversion effieiencies between 9.5% and 22.4%.Photochemical stabilities of them were better and might be used as laser dyes in ultraviolet and near ultraviolet band.