  A new meson mass relation for meson nonet is given after considering mixing
with glueball. The mixing between pseudoscalar mesons and pseudoscalar glueball
will decrease the mass of glueball by about 500 Mev. So, according to the
predicted mass of the pure pseudoscalar glueball given by lattice calculation
and effective Hamiltonian, the expected mass of mixed pseudoscalar glueball is
about 1.7 Gev. This result is helpful for experimemtal search for the mixed
Isoscalar pseudoscalar glueball.
