The electronic structure of MnS was studied using resonant inelastic soft X-ray scattering (RIXS) from 2p63d5→2p53d6→2p63d5 channel. The d-d excitation and charge-transfer (CT) excitation were obtained which were resonant at excitation energies corresponding to L absorption edge and the satellites, respectively. RIXS and XAS spectra were simulated by Hartree-Fock method under atomic SO3 and cubic Oh symmetries. The crystal field 10Dq value was evaluated to 0.80eV—0.85eV. The stronger CT excitation of MnS than that of MnO originates from its narrower bandwidth.