The negative and positive parity low-spin states of the even-odd Tungsten isotopes, 183,185,187 W are studied in the frame work of the Interacting Boson-Fermion Approximation (IBFA) model.The fermion that is coupled to the system of bosons is taken to be in the negative parity 2f 7/2 , 2f 5/2 , 3p 3/2 , 3p 1/2 and in the positive parity 1i 13/2 single-particle orbits. The calculated energies of low-spin energy levels of the odd isotopes are found to agree well with the experimental data.Also B(E2) values and spectroscopic factors for single-neutron transfer are calculated and found to be in good agreement with experimental data.