The cross-sections of the ⁹³Nb(n, 2n)^92mNb, ⁹³Nb(n, 3n)^91mNb and ⁹³Nb(n, 4n)⁹⁰Nb reactions with the average neutron energies of 14.4 to 34.0MeV have been determined by using an activation and off-line γ-ray spectrometric technique. The fast neutrons were produced using the ⁹Be(p, n)reaction with the proton energies of 25-, 35-and 45-MeV from the MC-50 Cyclotron at the Korea Institute of Ra-diological and Medical Sciences (KIRAMS). The neutron flux-weighted average cross-sections of the ⁹³Nb(n, xn;x=2–4) reactions were also obtained from the mono-energetic neutron-induced reaction cross-sections of 93Nb calculated using the TALYS 1.8 code, and the neutron flux spectrum based on the MCNPX 2.6.0 code. The present results for the ⁹³Nb(n, xn; x=2–4) reactions are compared with the calculated neutron flux-weighted average values and found to be in good agreement.