  We investigate the effects of neutrino-nucleus interactions (the nu-process)
on the production of iron-peak elements in Population III core-collapse
supernovae. The nu-process and the following proton and neutron capture
reactions produce odd-Z iron-peak elements in complete and incomplete Si
burning region. This reaction sequence enhances the abundances of Sc, Mn, and
Co in the supernova ejecta. The supernova explosion models of 15 M_sol and 25
M_sol stars with the nu-process well reproduce the averaged Mn/Fe ratio
observed in extremely metal-poor halo stars. In order to reproduce the observed
Mn/Fe ratio, the total neutrino energy in the supernovae should be 3 - 9 x
10^{53} ergs. Stronger neutrino irradiation and other production sites are
necessary to reproduce the observed Sc/Fe and Co/Fe ratios, although these
ratios increase by the nu-process.
