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Using a simple relativistic QFT model of scalar fields we demonstrate thatthe analytic confinement (propagator is an entire function in the complex$p^2$--plane) and the weak coupling constant lead to the Regge behaviour of thetwo-particle bound states. In QCD we assume that the gluon vacuum is realizedby the self-dual homogeneous classical field which is the solution of theYang-Mills equations. This assumption leads to analytical confinement of quarksand gluons. We extract the colorless $0^{++}$ two-gluon state from the QCDgenerating functional in the one-gluon exchange approximation. The mass of thisbound state is defined by the Bethe-Salpeter equation. The glueball mass is$1765~{\rm MeV}$ for $\alpha_s=0.33$ if the gluon condensate is$<(\alpha_s/\pi) G G >=0.012~{\rm GeV}^4$.Comment: 3 pages. Parallel talk given at the 5rd International Conference on  Quark Confinement and the Hadron Spectrum (Confinement V), Gargnano, Italy,  September 10-14, 2002. To appear in the proceeding

GLUEBALL AS A BOUND STATE IN THE SELF-DUAL HOMOGENEOUS VACUUM GLUON FIELD