  Glueballs are considered to be bound states of constituent gluons.
Relativistic wave equation for two massive gluons interacting by the
funnel-type potential is analyzed. Using two exact asymptotic solutions of the
equation, we derive an interpolating mass formula and calculate glueball masses
in agreement with the lattice data. We obtain the complex non-linear Pomeron
trajectory, $\alpha_P(t)$, in the whole region of $t$. The real part of the
trajectory corresponds to the soft Pomeron, parameters of which are found from
the fit of recent HERA data.
