The rate constant for the C6H5 + C6H5 recombination reaction has been determined in the temperature range 300-500 K using a laser photolysis/mass spectrometric technique. The result is represented by k(1) = (1.39 +/- 0.11) x 10(13)e(-(56+/-36)/T) cm(3)/(mol s). In addition, the rate constant for the C6H5 + C6H5NO association reaction was found to be k(4) = (4.90 +/- 0.19) x 10(12)e((34+/-16)/T) cm(3)/(mol s) by the mass balance of the initial concentration of C6H5 radicals. Using the result of k(1), previous kinetic data for C6H5 reactions determined. by the conventional relative rate method were reanalyzed.