Nearshore current caused by wave is one of the most important factors of littoral drift and pollutant dispersion. There is a numerical simulation program of tidal currents due to Alternative Direction Implicit Method in Port and Habour Research Institute. Two terms have been added to this program, a term of radiation stress and a term of bottom friction due to wave.
　To get the stabillity of calculation, radiation stress has been added gradually. The result has been checked with a modeml experiment and it has been found that the coefficient of bottom friction should be about 0.03.
　Nearshore current has been able to be calculated with enough accuracy by this modification. The distribution of wave height and direction in the calculation area is necessary as input data in this program.