Based on the one-boson-exchange-contribution model the effects of newly observed bosons (f0-meson, φ-meson and B-meson) on the nucleon-nucleon scattering are investigated. The f0-meson, if it is assigned to I=0 tensor (2+) boson, can improve the agreement of the model with experiments. The contributions of heavy vector bosons (φ-meson and B-meson) are not necessarily required for nuclear force as far as the energies below 300 MeV are concerned.