  Neutrino oscillations affect light element synthesis through the
neutrino-process in supernova explosions. The 7Li and 11B yields produced in a
supernova explosion of a 16.2 solar-mass star model increase by factors of 1.9
and 1.3 in the case of large mixing angle solution with normal mass hierarchy
and sin^{2}2theta_{13} > 0.002 compared with those without the oscillations. In
the case of inverted mass hierarchy or nonadiabatic 13-mixing resonance, the
increment of their yields is much smaller. Neutrino oscillations raise the
reaction rates of charged-current neutrino-process reactions in the region
outside oxygen-rich layers. The number ratio of 7Li/11B could be a tracer of
normal mass hierarchy and relatively large theta_{13}, still satisfying
sin^{2}2theta_{13} < 0.1, through future precise observations in stars having
strong supernova component.
