  The strange quark star is investigated within the enlarged SU(3)
Nambu-Jona-Lasinio (NJL). The stable quark star exists till maximal
configutation with rho_m=3.1, 10^15, g/cm^3 with M_m=1.61, M_Sun and R_m=8.74,
km is reached. Strange quarks appear for density above rho_c=9.84 g/cm^3 for
the quark star with radius R_c=8.003 km and M_c=0.77, M_Sun. The comparison of
a quark star properties obtained in the Quark Mean Field (QMF) approach to a
neutron star model constructed within the Relativistic Mean Field (RMF) theory
is presented.
