  Within the scope of Bianchi type-$IX$ we have studied the role of spinor
field in the evolution of the Universe. It is found that unlike the diagonal
Bianchi models in this case the components of energy-momentum tensor of spinor
field along the principal axis are not the same, i.e. $T_1^1 \ne T_2^2 \ne
T_3^3$, even in absence of spinor field nonlinearity. The presence of
nontrivial non-diagonal components of energy-momentum tensor of the spinor
field imposes severe restrictions both on geometry of space-time and on the
spinor field itself. As a result the space-time turns out to be either locally
rotationally symmetric or isotropic. In this paper we considered the Bianchi
type-$IX$ space-time both for a trivial $b$, that corresponds to standard $BIX$
and the one with a non-trivial $b$. It was found that a positive $\lambda_1$
gives rise to an oscillatory mode of expansion, while a trivial $\lambda_1$
leads to rapid expansion at the early stage of evolution.
