The contribution of the R-parity violating (RPV) minimal supersymmetric standard model (MSSM) to the neutron beta decay is discussed. The RPV effects contribute to the scalar interaction at the tree level. From it, we construct the effective interaction by using the nucleon mass difference and give its contribution to the angular correlations of the neutron beta decay within the recent phenomenological limits, i.e. the experimental result of the R correlation of the neutron beta decay given by PSI and the analyses of the Superallowed Fermi transitions.