The maximum bubble pressure method was used to measure the dynamic surface tension of triton x-100 solutions (below CMC, at the CMC, above CMC). SensaDyne surface tensiometer was used which employs maximum bubble pressure method. Wilhelmy plate method was employed to measure static surface tension. Measurements were performed at 28?C. Equilibrium surface concentration was estimated from Gibb?s adsorption equation. The Ward and Tordai equation was used to get the diffusion coefficient. The results are in agreement with the data obtained by other methods. The demicellization rate constant is obtained from the Ward and Tordai equations. It is found that the rate constant strongly depends on surfactant concentration.