  We study the r-process nucleosynthesis in neutrino-driven winds of
gravitational core collapse SNeII. Appropriate physical conditions are found
for successful r-process nucleosynthesis, which meet with several features of
heavy elements discovered recently in metal-deficient halo stars. We find also
several difficulties which are not explained in the present wind models. We
discuss quests for new insights in nuclear physics, astrophysics, and
astronomy.
