—Based on the multilevel model,numerical calculations of tidal current affected by the M_2 tidein the Tokyo Bay have been carried out.The results of calculation are compared with the data observed inthe Tokyo Bay and the result calculated by an approximate formula as the Tokyo Bay is regarded as a rec-tangular bay,and good agreement is found.It is proved that the mathematical model and the calculationmethod are correct and useable. -Based on the multilevel model, numerical calculations of tidal current affected by the M_2 tidein the Tokyo Bay have been carried out. The results of the calculations are compared with the data observed in Tokyo Bay and the result calculated by an approximate formula as the Tokyo Bay is regarded as a rec-tangular bay, and good agreement is found. It is proved that the mathematical model and the calculation method is correct and useable.