  In order to examine polarized strange quark distribution, semi-inclusive
$D/\Dbar$ production in neutrino deep inelastic scattering is studied including
${\cal O}(\alpha_s)$ corrections. Cross section and spin asymmetry are
calculated by using various parametrizations of polarized parton distribution
functions. It is found that $\Dbar$ production is promising to directly extract
the polarized strange sea.
