[en] The test of the model of new weak current of V + A structure suggested by De Rujula, Georgi and Glashow (DGG) is described in this paper. In the DGG model, quark mass terms are more restricted than those of the standard model, and it is found that a SU(2) triplet of scalars is needed in addition to the usual doublet in order to provide all quark masses. It is tried to obtain useful constraints to the DGG model by comparing the calculated rates of rare decay modes of K-mesons and K sub(L)-K sub(S) mass difference with observed values. For this purpose, the elementary amplitudes are computed, by assuming that the quarks are free and on their mass shell. The computation is performed under the further assumption that the W mass sufficiently exceeds any other scales in question, namely, the quark masses and external momenta. After necessary renormalization, the amplitudes are obtained. In conclusion, the charmed quark appears in the DGG model with very low mass relative to the ordinary quarks. This is not compatible with the mass scale set by the new psi resonance. The second order effects of the strangeness changing process arise in this model without the Cabibbo suppresion factor, and are enhanced by barring fortuitous cancellation. (Kato, T.)