The effects of dispersed droplets on mass transfer across the air-water interface with breaking waves were experimentally and numerically investigated. The diameter, velocity and horizontal flux of droplets were measured using a phase Doppler anemometer. The results show that the horizontal flux of droplets has an unversal size distribution independent of wind speed and height, and that the horizontal flux of droplets increases in proportion to the 8th power of friction velocity. In addition, the mass transfer across the air-water interface of a single droplet was estimated by means of a direct numerical simulation (DNS). The DNS shows that the contribution of dispersed droplets to the total mass transfer across air-water interface with breaking wave is about 0.3%.