An experimental study was conducted to measure the attenuation rates of mechanically generated regular and irregular water waves propagating against the wind. Measurements of static pressure and turbulence components in horizontal and vertical directions were also made with a disc probe and a X-type hot-film probe. These sensors were equipped to the wave follower.
　Distribution of wind-driven current was measured and the group velocity of the waves propagating against this current was calculated. From the calculation, it was confirmed that the group velocity of longer waves is not influenced very much by the wind-driven current.　From the measurements of the static pressure and turbulence components, the coupling coefficient was formulated in terms of the relative wind speed and the wave slope. Correction factor of the coupling coefficient was estimated so that the attenuation coefficients of waves fit the measured data. Decay of component waves of irregular waves was also measured and it was confirmed that the attenuation of component waves can be estimated by the coupling coefficient obtained by the regular wave experiment.
　Finally the diagrams which represent the decay of waves propagating against the wind were presented.