  We formulate a set of mass relations for the baryon octet and decuplet with
positive and negative parity in terms of the order parameter of QCD chiral
symmetry. The Gell-Mann--Okubo mass formula and Gell-Mann's equal spacing rule
hold manifestly in this approach. Thermal masses of the baryons are calculated
in the mean field approximation for various pion masses, and the results are
compared with the recent lattice studies. A general trend of the nucleon,
$\Delta$ and $\Omega$ parity-doublers seen in the available lattice data can be
understood qualitatively. Expected mass modifications of other strange baryons
are also given with the physical and heavier pion masses.
